diff --git a/application/controllers/system/issues/IssuesKonfiguration.php b/application/controllers/system/issues/IssuesKonfiguration.php
index f6b3ff556..a19a2a93b 100644
--- a/application/controllers/system/issues/IssuesKonfiguration.php
+++ b/application/controllers/system/issues/IssuesKonfiguration.php
@@ -18,7 +18,8 @@ class IssuesKonfiguration extends Auth_Controller
 				'getApps' => 'admin:r',
 				'getFehlerKonfigurationByApp' => 'admin:r',
 				'saveFehlerKonfiguration' => 'admin:rw',
-				'deleteKonfiguration' => 'admin:rw'
+				'deleteKonfiguration' => 'admin:rw',
+				'deleteKonfigurationsWerte' => 'admin:rw'
 			)
 		);
 
@@ -204,6 +205,73 @@ class IssuesKonfiguration extends Auth_Controller
 		$this->outputJson($result);
 	}
 
+	/**
+	 * Deletes values of a Konfiguration.
+	 */
+	public function deleteKonfigurationsWerte()
+	{
+		$konfigurationstyp_kurzbz = $this->input->post('konfigurationstyp_kurzbz');
+		$fehlercode = $this->input->post('fehlercode');
+		$konfigurationsWert = $this->input->post('konfigurationsWert');
+
+		// check if Konfigurationstyp correctly passed
+		if (isEmptyString($konfigurationstyp_kurzbz)) $this->terminateWithJsonError($this->p->t('fehlermonitoring', 'ungueltigerKonfigurationstyp'));
+
+		// check if fehlercode correctly passed
+		if (isEmptyString($fehlercode)) $this->terminateWithJsonError($this->p->t('fehlermonitoring', 'fehlercodeFehlt'));
+
+		// separate by semicolon if multiple values passed
+		$konfigurationsWert = explode(';', $konfigurationsWert);
+
+		// check if konfiguration already set for the fehlercode
+		$this->FehlerkonfigurationModel->addSelect('konfiguration');
+		$fehlerkonfigurationRes = $this->FehlerkonfigurationModel->loadWhere(
+			array(
+				'konfigurationstyp_kurzbz' => $konfigurationstyp_kurzbz,
+				'fehlercode' => $fehlercode
+			)
+		);
+
+		if (!hasData($fehlerkonfigurationRes)) $this->terminateWithJsonError($this->p->t('fehlermonitoring', 'fehlerFehlerKonfigurationLaden'));
+
+		// if konfiguration exists, update values
+		if (hasData($fehlerkonfigurationRes))
+		{
+			$fehlerkonfiguration = getData($fehlerkonfigurationRes);
+
+			$existingKonf = json_decode($fehlerkonfiguration[0]->konfiguration);
+
+			if (!$existingKonf) $this->terminateWithJsonError($this->p->t('fehlermonitoring', 'fehlerJsonDekodierung'));
+
+			if (!is_array($existingKonf)) $existingKonf = array($existingKonf);
+
+			$newKonfArr = array_values(array_diff($existingKonf, $konfigurationsWert));
+
+			// if no konfiguration values left, delete whole entry
+			if (isEmptyArray($newKonfArr))
+			{
+				$this->outputJson(
+					$this->FehlerkonfigurationModel->delete(
+						array('konfigurationstyp_kurzbz' => $konfigurationstyp_kurzbz, 'fehlercode' => $fehlercode)
+					)
+				);
+			}
+			else
+			{
+				$newKonf = json_encode($newKonfArr);
+				if (!$newKonf) $this->terminateWithJsonError("error when encoding JSON");
+
+				// if there are still values, delete only part of the konfiguration
+				$this->outputJson(
+					$this->FehlerkonfigurationModel->update(
+						array('konfigurationstyp_kurzbz' => $konfigurationstyp_kurzbz, 'fehlercode' => $fehlercode),
+						array('konfiguration' => $newKonf, 'updateamum' => 'NOW()', 'updatevon' => $this->_uid)
+					)
+				);
+			}
+		}
+	}
+
 	/**
 	 * Deletes a Konfiguration.
 	 */
diff --git a/application/libraries/issues/PlausicheckLib.php b/application/libraries/issues/PlausicheckLib.php
deleted file mode 100644
index 9c768da02..000000000
--- a/application/libraries/issues/PlausicheckLib.php
+++ /dev/null
@@ -1,1627 +0,0 @@
-<?php
-
-if (! defined('BASEPATH')) exit('No direct script access allowed');
-
-/**
- * Library containing database queries for execution of core plausichecks.
- */
-class PlausicheckLib
-{
-	private $_ci; // Code igniter instance
-	private $_db; // database object
-
-	/**
-	 * Object initialization
-	 */
-	public function __construct()
-	{
-		$this->_ci =& get_instance(); // get ci instance
-
-		// load models
-		$this->_ci->load->model('crm/Prestudent_model', 'PrestudentModel');
-		$this->_ci->load->model('crm/Prestudentstatus_model', 'PrestudentstatusModel');
-		$this->_ci->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
-
-		// get database for queries
-		$this->_db = new DB_Model();
-	}
-
-	//------------------------------------------------------------------------------------------------------------------
-	// Studiengang checks
-
-	/**
-	 * Studiengang should be the same for prestudent and student.
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getStgPrestudentUngleichStgStudent($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
-	{
-		$params = array();
-
-		$qry = "
-			SELECT
-				pre.person_id, pre.prestudent_id, stg.oe_kurzbz prestudent_stg_oe_kurzbz, student_stg.oe_kurzbz student_stg_oe_kurzbz
-			FROM
-				public.tbl_prestudent pre
-				JOIN public.tbl_student stud USING(prestudent_id)
-				JOIN public.tbl_person pers USING(person_id)
-				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
-				JOIN public.tbl_studiengang student_stg ON stud.studiengang_kz = student_stg.studiengang_kz
-			WHERE
-				stud.studiengang_kz != pre.studiengang_kz";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND pre.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Orgform of a Studiengang in Studienplan should be the same as orgform of student.
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getOrgformStgUngleichOrgformPrestudent(
-		$studiensemester_kurzbz,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array($studiensemester_kurzbz);
-
-		$qry = "
-			SELECT
-				prestudent.person_id, prestudent.prestudent_id, status.studiensemester_kurzbz,
-				studiengang.orgform_kurzbz AS stg_orgform, status.orgform_kurzbz AS student_orgform,
-				prestudent.studiengang_kz AS student_studiengang, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_studiengang studiengang
-				JOIN public.tbl_student student USING(studiengang_kz)
-				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_benutzer benutzer on(benutzer.uid = student.student_uid)
-				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
-				LEFT JOIN lehre.tbl_studienplan stpl USING (studienplan_id)
-			WHERE
-				benutzer.aktiv = true
-				AND status.status_kurzbz IN ('Student', 'Unterbrecher', 'Abbrecher', 'Diplomand', 'Absolvent')
-				AND studiengang.studiengang_kz < 10000
-				AND status.studiensemester_kurzbz = ?
-				AND NOT (status.orgform_kurzbz IS NULL AND studiengang.mischform = FALSE)
-				AND NOT EXISTS(
-					SELECT 1
-					FROM
-						lehre.tbl_studienplan
-					JOIN
-						lehre.tbl_studienordnung USING(studienordnung_id)
-					WHERE
-						tbl_studienplan.studienplan_id = stpl.studienplan_id
-						AND tbl_studienordnung.studiengang_kz = prestudent.studiengang_kz
-						AND tbl_studienplan.orgform_kurzbz = status.orgform_kurzbz)";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND studiengang.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND prestudent.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		$qry .= "
-			ORDER BY student_uid";
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Students in "mixed" Studiengang should have Orgform.
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getPrestudentMischformOhneOrgform(
-		$studiensemester_kurzbz,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array($studiensemester_kurzbz);
-
-		$qry = "
-			SELECT
-				pre.person_id, pre.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, status.studiensemester_kurzbz
-			FROM
-				public.tbl_prestudent pre
-				JOIN public.tbl_person USING(person_id)
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_studiengang stg USING(studiengang_kz)
-			WHERE
-				status.status_kurzbz IN ('Bewerber', 'Student')
-				AND stg.mischform
-				AND (status.orgform_kurzbz='' OR status.orgform_kurzbz IS NULL)
-				AND status.studiensemester_kurzbz=?";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND pre.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Studiengang should be the same for prestudent and studienplan.
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param studienordnung_id int if check is to be executed only for a certain studienordnung_id
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getStgPrestudentUngleichStgStudienplan(
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$studienordnung_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array();
-
-		$qry = "
-			SELECT
-				DISTINCT ON (ps.prestudent_id) ps.person_id, ps.prestudent_id, stordnung.studienordnung_id,
-				stplan.bezeichnung AS studienplan, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_prestudent ps
-				JOIN public.tbl_prestudentstatus USING(prestudent_id)
-				JOIN lehre.tbl_studienplan stplan USING(studienplan_id)
-				JOIN lehre.tbl_studienordnung stordnung USING(studienordnung_id)
-				JOIN public.tbl_person USING(person_id)
-				JOIN public.tbl_studiengang stg ON ps.studiengang_kz = stg.studiengang_kz
-			WHERE
-				ps.studiengang_kz<>stordnung.studiengang_kz
-				AND stg.melderelevant";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND ps.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($studienordnung_id))
-		{
-			$qry .= " AND stordnung.studienordnung_id = ?";
-			$params[] = $studienordnung_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	//------------------------------------------------------------------------------------------------------------------
-	// Studentstatus checks
-
-	/**
-	 * Abbrecher cannot be active.
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getAbbrecherAktiv($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
-	{
-		$params = array();
-
-		$qry = "
-			SELECT
-				pre.person_id, pre.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_prestudentstatus pre_status
-				JOIN public.tbl_prestudent pre USING(prestudent_id)
-				JOIN public.tbl_student student USING(prestudent_id)
-				JOIN public.tbl_benutzer benutzer on(benutzer.uid=student.student_uid)
-				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
-			WHERE
-				pre_status.status_kurzbz ='Abbrecher'
-				AND benutzer.aktiv=true";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND pre.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * There shouldn't be any status after Abbrecher status.
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getStudentstatusNachAbbrecher($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
-	{
-		$params = array();
-
-		$qry = "
-			SELECT
-				prestudent.person_id, prestudent.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_student student
-				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
-				JOIN public.tbl_prestudentstatus prestatus USING(prestudent_id)
-				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
-			WHERE
-				prestatus.status_kurzbz = 'Abbrecher'
-				AND get_rolle_prestudent(prestudent.prestudent_id, prestatus.studiensemester_kurzbz) <> 'Abbrecher'";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND prestudent.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Ausbildungssemester of prestudent (lehrverband) must be the same as Ausbildungssemester of prestudentstatus.
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getAusbildungssemPrestudentUngleichAusbildungssemStatus(
-		$studiensemester_kurzbz,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array($studiensemester_kurzbz, $studiensemester_kurzbz, $studiensemester_kurzbz);
-
-		$qry = "
-			SELECT
-				DISTINCT(student.student_uid), student.student_uid, prestudent.person_id, prestudent.prestudent_id,
-				status.ausbildungssemester AS status_ausbildungssemester, lv.semester AS student_ausbildungssemester, status.studiensemester_kurzbz,
-				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_student student
-				JOIN public.tbl_studentlehrverband lv USING(student_uid)
-				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
-			WHERE
-				status.studiensemester_kurzbz = ?
-				AND lv.studiensemester_kurzbz = ?
-				AND status.status_kurzbz NOT IN ('Interessent','Bewerber','Aufgenommener','Wartender','Abgewiesener','Unterbrecher')
-				AND get_rolle_prestudent (prestudent_id, ?)='Student'
-				AND status.ausbildungssemester != lv.semester";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND prestudent.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Students with active status should have an active Benutzer.
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getInaktiverStudentAktiverStatus(
-		$studiensemester_kurzbz,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$aktStudiensemesterRes = $this->_ci->StudiensemesterModel->getAkt();
-
-		if (isError($aktStudiensemesterRes)) return $aktStudiensemesterRes;
-
-		$studiensemester_kurzbz = hasData($aktStudiensemesterRes) ? getData($aktStudiensemesterRes)[0]->studiensemester_kurzbz : '';
-
-		$params = array($studiensemester_kurzbz);
-
-		$qry = "
-			SELECT
-				DISTINCT(student.student_uid), prestudent.person_id, prestudent.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_benutzer benutzer
-				JOIN public.tbl_student student on(benutzer.uid = student.student_uid)
-				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
-				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
-			WHERE
-				benutzer.aktiv=false
-				AND EXISTS (SELECT 1 FROM public.tbl_prestudentstatus WHERE prestudent_id = prestudent.prestudent_id AND studiensemester_kurzbz = ?)
-				AND get_rolle_prestudent(prestudent_id, NULL) IN ('Student', 'Diplomand', 'Unterbrecher', 'Praktikant')
-				AND stg.melderelevant
-				AND prestudent.bismelden";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND prestudent.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Students of a semester shouldn't start studies before the date of Bismeldung.
-	 * e.g. If student studies in WS2022 datum of status shouldn't be before 15.4.2020
-	 * e.g. If student studies in SS2022 datum of status shouldn't be before 15.11.2022
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getInskriptionVorLetzerBismeldung(
-		$studiensemester_kurzbz,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		// get Bismeldedatum
-		$datumBis = $this->_getBisdateFromSemester($studiensemester_kurzbz);
-
-		$params = array($datumBis, $studiensemester_kurzbz, $datumBis);
-
-		// get active students
-		$qry = "
-			SELECT
-				DISTINCT ON (student.student_uid) ? AS datum_bismeldung,
-				prestudent.person_id, prestudent.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, status.studiensemester_kurzbz
-			FROM
-				public.tbl_benutzer benutzer
-				JOIN public.tbl_student student on(benutzer.uid = student.student_uid)
-				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
-			WHERE
-				benutzer.aktiv=true
-				AND status.studiensemester_kurzbz = ?
-				/* inscription date before date of first student status */
-				AND (
-					SELECT datum
-					FROM public.tbl_prestudentstatus
-					WHERE prestudent_id = prestudent.prestudent_id
-					AND studiensemester_kurzbz = status.studiensemester_kurzbz
-					AND status_kurzbz = 'Student'
-					ORDER BY datum, insertamum, ext_id
-					LIMIT 1
-				) < ?
-				AND stg.melderelevant
-				AND prestudent.bismelden";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND prestudent.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Status Dates and status studysemester dates should be in correct order.
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if check is to be executed only for certain Studiengaenge
-	 * @return success with prestudents or error
-	 */
-	public function getDatumStudiensemesterFalscheReihenfolge($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
-	{
-		$params = array();
-
-		// all active students with Status student in current semester
-		$qry = "
-			SELECT DISTINCT ON (prestudent_id) *
-			FROM (
-				SELECT
-					prestudent.person_id, prestudent.prestudent_id,
-					stg.studiengang_kz, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz,
-					ROW_NUMBER () OVER (
-						PARTITION BY prestudent.prestudent_id
-						ORDER BY sem.start DESC, status.datum DESC, status.insertamum DESC, status.ext_id DESC
-					) AS reihenfolge_semester,
-					ROW_NUMBER () OVER (
-						PARTITION BY prestudent.prestudent_id
-						ORDER BY status.datum DESC, status.insertamum DESC, status.ext_id DESC
-					) AS reihenfolge_datum
-				FROM
-					public.tbl_student student
-					JOIN public.tbl_benutzer benutzer on(student.student_uid = benutzer.uid)
-					JOIN public.tbl_prestudent prestudent USING(prestudent_id)
-					JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-					JOIN public.tbl_studiensemester sem USING(studiensemester_kurzbz)
-					JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
-				WHERE
-					benutzer.aktiv=true
-					AND status.status_kurzbz='Student'
-			) reihenfolge
-			WHERE reihenfolge_semester <> reihenfolge_datum";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Students with active Benutzer should have a status in the current semester.
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getAktiverStudentOhneStatus($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
-	{
-		$params = array();
-
-		$qry = "
-			SELECT
-				DISTINCT (student_uid), prestudent.person_id, prestudent.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_student student
-				JOIN public.tbl_benutzer benutzer on (benutzer.uid = student.student_uid)
-				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
-				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
-			WHERE
-				benutzer.aktiv=TRUE
-				AND stg.melderelevant
-				AND prestudent.bismelden
-				AND NOT EXISTS (
-					SELECT 1
-					FROM public.tbl_prestudentstatus
-					JOIN public.tbl_studiensemester sem USING (studiensemester_kurzbz)
-					WHERE prestudent_id = prestudent.prestudent_id
-					/* buffer of four months, as status are often entered later */
-					AND sem.ende::date > NOW() - interval '4 months'
-				)";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND prestudent.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Studienplan should be valid in current Ausbildungssemester of prestudent.
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getStudienplanUngueltig(
-		$studiensemester_kurzbz,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array($studiensemester_kurzbz);
-
-		$qry = "
-			SELECT
-				DISTINCT pre.person_id, pre.prestudent_id,
-				tbl_studienplan.bezeichnung AS studienplan,
-				status.status_kurzbz,
-				status.studiensemester_kurzbz,
-				status.ausbildungssemester,
-				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_prestudent pre
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_person USING(person_id)
-				JOIN lehre.tbl_studienplan USING(studienplan_id)
-				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
-			WHERE
-				status_kurzbz in('Student', 'Interessent','Bewerber','Aufgenommener')
-				AND NOT EXISTS (
-					SELECT
-						1
-					FROM
-						lehre.tbl_studienplan_semester
-					WHERE
-						studienplan_id=status.studienplan_id
-						AND tbl_studienplan_semester.semester = status.ausbildungssemester
-						AND tbl_studienplan_semester.studiensemester_kurzbz = status.studiensemester_kurzbz
-				)
-				AND status.studiensemester_kurzbz=?
-				AND pre.bismelden
-				AND stg.melderelevant";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND tbl_prestudent.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Students with finished studies should have exactly one final exam.
-	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getFalscheAnzahlAbschlusspruefungen(
-		$studiensemester_kurzbz = null,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array();
-
-		$qry = "
-			SELECT * FROM (
-				SELECT
-					DISTINCT ON(pre.prestudent_id) pre.person_id, pre.prestudent_id, student_uid, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz,
-					(
-						SELECT COUNT(*)
-						FROM lehre.tbl_abschlusspruefung
-						WHERE student_uid = stud.student_uid
-						AND abschlussbeurteilung_kurzbz != 'nicht'
-						AND abschlussbeurteilung_kurzbz IS NOT NULL
-					) AS anzahl_abschlusspruefungen
-				FROM
-					public.tbl_prestudent pre
-					JOIN public.tbl_student stud USING(prestudent_id)
-					JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-					JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
-				WHERE
-					status_kurzbz = 'Absolvent'
-					AND pre.bismelden
-					AND stg.melderelevant
-					AND NOT EXISTS ( /* exclude gs */
-						SELECT 1
-						FROM bis.tbl_mobilitaet
-						WHERE prestudent_id = pre.prestudent_id
-						AND studiensemester_kurzbz = status.studiensemester_kurzbz
-					)";
-
-		if (isset($studiensemester_kurzbz))
-		{
-			$qry .= " AND status.studiensemester_kurzbz = ?";
-			$params[] = $studiensemester_kurzbz;
-		}
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND pre.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		$qry .= ") studenten
-			WHERE anzahl_abschlusspruefungen != 1";
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Date of final exam shouldn't be missing for Absolvent.
-	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param abschlusspruefung_id int if check is to be executed for a certain Abschlussprüfung
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getDatumAbschlusspruefungFehlt(
-		$studiensemester_kurzbz = null,
-		$studiengang_kz = null,
-		$abschlusspruefung_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$results = array();
-
-		$pruefungenRes = $this->_getInvalidAbschlusspruefungen(
-			$studiensemester_kurzbz,
-			$studiengang_kz,
-			$abschlusspruefung_id,
-			$exkludierte_studiengang_kz
-		);
-
-		if (isError($pruefungenRes)) return $pruefungenRes;
-
-		if (hasData($pruefungenRes))
-		{
-			$pruefungen = getData($pruefungenRes);
-
-			foreach ($pruefungen as $pruefung)
-			{
-				if (isEmptyString($pruefung->datum)) $results[] = $pruefung;
-			}
-		}
-
-		return success($results);
-	}
-
-	/**
-	 * Date of sponsion shouldn't be missing for Absolvent.
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param abschlusspruefung_id int if check is to be executed only for a certain Abschlussprüfung
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getDatumSponsionFehlt(
-		$studiensemester_kurzbz = null,
-		$studiengang_kz = null,
-		$abschlusspruefung_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$results = array();
-
-		$pruefungenRes = $this->_getInvalidAbschlusspruefungen(
-			$studiensemester_kurzbz,
-			$studiengang_kz,
-			$abschlusspruefung_id,
-			$exkludierte_studiengang_kz
-		);
-
-		if (isError($pruefungenRes)) return $pruefungenRes;
-
-		if (hasData($pruefungenRes))
-		{
-			$pruefungen = getData($pruefungenRes);
-
-			foreach ($pruefungen as $pruefung)
-			{
-				if (isEmptyString($pruefung->sponsion)) $results[] = $pruefung;
-			}
-		}
-
-		return success($results);
-	}
-
-	/**
-	 * Bewerber should have participated in Reihungstest.
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getBewerberNichtZumRtAngetreten(
-		$studiensemester_kurzbz,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$previousStudiensemesterRes = $this->_ci->StudiensemesterModel->getPreviousFrom($studiensemester_kurzbz);
-
-		if (isError($previousStudiensemesterRes)) return $previousStudiensemesterRes;
-
-		$params = array($studiensemester_kurzbz);
-
-		$qry = "
-			SELECT
-				prestudent.person_id, prestudent.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, status.studiensemester_kurzbz
-			FROM
-				public.tbl_prestudent prestudent
-				JOIN public.tbl_prestudentstatus status ON(prestudent.prestudent_id=status.prestudent_id)
-				JOIN public.tbl_person USING(person_id)
-				LEFT JOIN bis.tbl_orgform USING(orgform_kurzbz)
-				JOIN public.tbl_studiengang stg USING(studiengang_kz)
-			WHERE
-				status_kurzbz='Bewerber'
-				AND reihungstestangetreten=false
-				AND stg.melderelevant
-				AND prestudent.bismelden";
-
-		if (hasData($previousStudiensemesterRes))
-		{
-			$previousStudiensemester = getData($previousStudiensemesterRes)[0]->studiensemester_kurzbz;
-			$qry .= " AND (studiensemester_kurzbz=? OR studiensemester_kurzbz=?)";
-			$params[] = $previousStudiensemester;
-		}
-		else
-		{
-			$qry .= " AND studiensemester_kurzbz=?";
-		}
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND prestudent.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Current Ausbildungssemester shouldn't be 0.
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getAktSemesterNull($studiensemester_kurzbz, $studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
-	{
-		$params = array($studiensemester_kurzbz);
-
-		$qry = "
-			SELECT
-				DISTINCT pre.person_id, pre.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, prestat.studiensemester_kurzbz
-			FROM
-				public.tbl_prestudent pre
-				JOIN public.tbl_prestudentstatus prestat USING(prestudent_id)
-				JOIN public.tbl_studiengang stg USING(studiengang_kz)
-			WHERE
-				prestat.status_kurzbz != 'Incoming'
-				AND prestat.studiensemester_kurzbz = ?
-				AND ausbildungssemester = 0
-				AND stg.melderelevant
-				AND pre.bismelden";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND pre.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Prestudent should have a final status.
-	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getAbschlussstatusFehlt(
-		$studiensemester_kurzbz = null,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array();
-
-		$qry = "
-			SELECT
-				DISTINCT ON (pre.prestudent_id)
-				pre.person_id, pre.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, status.studiensemester_kurzbz
-			FROM
-				public.tbl_prestudent pre
-				JOIN public.tbl_person USING(person_id)
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_studiengang stg USING(studiengang_kz)
-			WHERE
-				NOT EXISTS( /*student does not study anymore*/
-					SELECT
-						1
-					FROM
-						public.tbl_prestudentstatus ps
-						JOIN public.tbl_studiensemester USING(studiensemester_kurzbz)
-					WHERE
-						prestudent_id=pre.prestudent_id
-						/* 4 months: There might be Diplomanden, in summer months end status is often not entered yet */
-						AND tbl_studiensemester.ende>now() - interval '4 months'
-				)
-				/* check only valid begininng with 2018 */
-				AND '2018-01-01'<(SELECT max(datum) FROM public.tbl_prestudentstatus WHERE prestudent_id=pre.prestudent_id)
-				AND NOT EXISTS( /* no end status */
-					SELECT 1
-					FROM public.tbl_prestudentstatus ps
-					WHERE
-						prestudent_id=pre.prestudent_id
-						AND status_kurzbz IN('Abbrecher','Abgewiesener','Absolvent','Incoming')
-				)
-				AND stg.melderelevant
-				AND pre.bismelden";
-
-		if (isset($studiensemester_kurzbz))
-		{
-			$prevStudiensemesterRes = $this->_ci->StudiensemesterModel->getPreviousFrom($studiensemester_kurzbz);
-
-			if (isError($prevStudiensemesterRes)) return $prevStudiensemesterRes;
-
-			if (hasData($prevStudiensemesterRes))
-			{
-				// if Studiensemester given, check only if has status in current or previous semester
-				$prevStudiensemester = getData($prevStudiensemesterRes)[0]->studiensemester_kurzbz;
-				$qry .= " AND EXISTS (
-							SELECT 1
-							FROM public.tbl_prestudentstatus ps
-							WHERE studiensemester_kurzbz IN (?, ?)
-							AND ps.prestudent_id = pre.prestudent_id
-						)";
-				$params[] = $prevStudiensemester;
-				$params[] = $studiensemester_kurzbz;
-			}
-		}
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND pre.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Student with active status should have been charged, i.e. have a Kontobuchung with a negative or zero value.
-	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getAktiverStudentstatusOhneKontobuchung(
-		$studiensemester_kurzbz,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array($studiensemester_kurzbz);
-
-		$qry = "
-			SELECT
-				DISTINCT ON (pre.prestudent_id)
-				pre.person_id, pre.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, status.studiensemester_kurzbz
-			FROM
-				public.tbl_prestudent pre
-				JOIN public.tbl_person pers USING(person_id)
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_studiengang stg USING(studiengang_kz)
-			WHERE
-				status.studiensemester_kurzbz = ?
-				AND status.status_kurzbz IN ('Student', 'Incoming')
-				AND NOT EXISTS (
-					SELECT 1
-					FROM
-						public.tbl_konto
-					WHERE
-						person_id = pers.person_id
-						AND studiensemester_kurzbz = status.studiensemester_kurzbz
-						AND buchungsnr_verweis IS NULL
-						AND betrag <= 0
-				)
-				AND stg.melderelevant
-				AND pre.bismelden";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND pre.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	//------------------------------------------------------------------------------------------------------------------
-	// Person checks
-
-	/**
-	 * Birthdate is too long ago.
-	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param person_id int if check is to be executed only for one person
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getGbDatumWeitZurueck(
-		$studiensemester_kurzbz = null,
-		$studiengang_kz = null,
-		$person_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array();
-
-		$qry = "
-			SELECT
-				pers.person_id
-			FROM
-				public.tbl_person pers
-			WHERE
-				pers.gebdatum < '1920-01-01'
-				AND EXISTS (
-					SELECT 1
-					FROM public.tbl_prestudent
-					JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-					JOIN public.tbl_studiengang stg USING(studiengang_kz)
-					WHERE person_id = pers.person_id";
-
-		if (isset($studiensemester_kurzbz))
-		{
-			$qry .= " AND status.studiensemester_kurzbz = ?";
-			$params[] = $studiensemester_kurzbz;
-		}
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		$qry .= ")";
-
-		if (isset($person_id))
-		{
-			$qry .= " AND pers.person_id = ?";
-			$params[] = $person_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Nation is not Austria, but address has austrian Gemeinde.
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param person_id int if check is to be executed only for one person
-	 * @return success with prestudents or error
-	 */
-	public function getNationNichtOesterreichAberGemeinde($studiengang_kz = null, $person_id = null, $exkludierte_studiengang_kz = null)
-	{
-		$params = array();
-
-		$qry = "SELECT DISTINCT tbl_person.person_id, adr.gemeinde, adr.adresse_id
-				FROM
-					public.tbl_adresse adr
-					JOIN public.tbl_prestudent USING(person_id)
-					JOIN public.tbl_person USING(person_id)
-					JOIN public.tbl_student USING(prestudent_id)
-					JOIN public.tbl_benutzer ON(uid=student_uid)
-					JOIN public.tbl_studiengang stg ON tbl_prestudent.studiengang_kz = stg.studiengang_kz
-				WHERE
-					adr.nation!='A'
-					AND tbl_benutzer.aktiv
-					AND gemeinde NOT IN ('Münster')
-					AND EXISTS(SELECT 1 FROM bis.tbl_gemeinde WHERE name = adr.gemeinde)";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($person_id))
-		{
-			$qry .= " AND tbl_person.person_id = ?";
-			$params[] = $person_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Students should have exactly one home address.
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param person_id int if check is to be executed only for one person
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getFalscheAnzahlHeimatadressen(
-		$studiensemester_kurzbz = null,
-		$studiengang_kz = null,
-		$person_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array();
-
-		$qry = "
-			SELECT
-				DISTINCT person_id
-			FROM
-				(
-					SELECT person_id, COUNT(adresse_id) AS anzahl_adressen
-					FROM public.tbl_adresse addr
-					WHERE heimatadresse IS TRUE
-					GROUP BY person_id
-				) adressen
-				JOIN public.tbl_person USING(person_id)
-				JOIN public.tbl_prestudent pre USING(person_id)
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_student USING(prestudent_id)
-				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
-			WHERE
-				anzahl_adressen != 1
-				AND stg.melderelevant
-				AND pre.bismelden";
-
-		if (isset($studiensemester_kurzbz))
-		{
-			$qry .= " AND status.studiensemester_kurzbz = ?";
-			$params[] = $studiensemester_kurzbz;
-		}
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($person_id))
-		{
-			$qry .= " AND person_id = ?";
-			$params[] = $person_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Students should have exactly one delivery address.
-	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param person_id int if check is to be executed only for one person
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getFalscheAnzahlZustelladressen(
-		$studiensemester_kurzbz = null,
-		$studiengang_kz = null,
-		$person_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array();
-
-		$qry = "
-			SELECT
-				DISTINCT person_id
-			FROM
-				(
-					SELECT person_id, COUNT(adresse_id) AS anzahl_adressen
-					FROM public.tbl_adresse addr
-					WHERE zustelladresse IS TRUE
-					GROUP BY person_id
-				) adressen
-				JOIN public.tbl_person USING(person_id)
-				JOIN public.tbl_prestudent pre USING(person_id)
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_student USING(prestudent_id)
-				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
-			WHERE
-				anzahl_adressen != 1
-				AND stg.melderelevant
-				AND pre.bismelden";
-
-		if (isset($studiensemester_kurzbz))
-		{
-			$qry .= " AND status.studiensemester_kurzbz = ?";
-			$params[] = $studiensemester_kurzbz;
-		}
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($person_id))
-		{
-			$qry .= " AND person_id = ?";
-			$params[] = $person_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	//------------------------------------------------------------------------------------------------------------------
-	// I/O checks
-
-	/**
-	 * Incoming shouldn't have austrian home address.
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param person_id int if check is to be executed only for one person
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getIncomingHeimatNationOesterreich(
-		$studiensemester_kurzbz,
-		$studiengang_kz = null,
-		$person_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array($studiensemester_kurzbz);
-
-		$qry = "
-			SELECT
-				DISTINCT pers.person_id, status.studiensemester_kurzbz
-			FROM
-				public.tbl_prestudent pre
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_person pers USING(person_id)
-				JOIN public.tbl_adresse addr USING(person_id)
-				JOIN public.tbl_studiengang stg USING(studiengang_kz)
-			WHERE
-				status.status_kurzbz = 'Incoming'
-				AND addr.nation = 'A'
-				AND addr.heimatadresse
-				AND status.studiensemester_kurzbz = ?
-				AND stg.melderelevant
-				AND pre.bismelden";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($person_id))
-		{
-			$qry .= " AND pers.person_id = ?";
-			$params[] = $person_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Incoming should have IN/OUT data.
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return success with prestudents or error
-	 */
-	public function getIncomingOhneIoDatensatz($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
-	{
-		$params = array();
-
-		$qry = "
-			SELECT
-				DISTINCT ON(student_uid, nachname, vorname)
-				tbl_person.person_id,
-				tbl_prestudent.prestudent_id,
-				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_student
-				JOIN public.tbl_benutzer ON(student_uid=uid)
-				JOIN public.tbl_person USING(person_id)
-				JOIN public.tbl_prestudent USING(prestudent_id)
-				JOIN public.tbl_prestudentstatus ON(tbl_prestudent.prestudent_id=tbl_prestudentstatus.prestudent_id)
-				JOIN public.tbl_studiengang stg ON(stg.studiengang_kz=tbl_student.studiengang_kz)
-			WHERE
-				bismelden=TRUE
-				AND status_kurzbz='Incoming' AND NOT EXISTS (SELECT 1 FROM bis.tbl_bisio WHERE student_uid=tbl_student.student_uid)
-				AND stg.melderelevant";
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND tbl_prestudent.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Incoming or gemeinsame Studien students should not receive funding (not be förderrelevant).
-	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param prestudent_id int if check is to be executed only for one prestudent
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 * @return object success or error
-	 */
-	public function getIncomingOrGsFoerderrelevant(
-		$studiensemester_kurzbz = null,
-		$studiengang_kz = null,
-		$prestudent_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array();
-
-		$qry = "
-			SELECT
-				DISTINCT ON(prestudent_id)
-				pers.person_id,
-				ps.prestudent_id,
-				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_student stud
-				JOIN public.tbl_benutzer ON(student_uid=uid)
-				JOIN public.tbl_person pers USING(person_id)
-				JOIN public.tbl_prestudent ps USING(prestudent_id)
-				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
-				JOIN public.tbl_studiengang stg ON(stg.studiengang_kz=stud.studiengang_kz)
-			WHERE
-				(
-					status.status_kurzbz = 'Incoming'
-					OR EXISTS (
-						SELECT 1
-						FROM
-							bis.tbl_mobilitaet
-							JOIN public.tbl_prestudent USING(prestudent_id)
-						WHERE
-							prestudent_id = ps.prestudent_id
-							AND gsstudientyp_kurzbz = 'Extern'
-					)
-				)
-				AND (ps.foerderrelevant <> FALSE OR ps.foerderrelevant IS NULL)
-				AND bismelden=TRUE
-				AND stg.melderelevant";
-
-		if (isset($studiensemester_kurzbz))
-		{
-			$qry .= " AND status.studiensemester_kurzbz = ?";
-			$params[] = $studiensemester_kurzbz;
-		}
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($prestudent_id))
-		{
-			$qry .= " AND ps.prestudent_id = ?";
-			$params[] = $prestudent_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	//------------------------------------------------------------------------------------------------------------------
-	// Private methods
-
-	/**
-	 * Get final exams in a semester which are invalid (e.g. missing data)
-	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiengang
-	 * @param studiengang_kz int if check is to be executed for certain Studiengang
-	 * @param abschlusspruefung_id int if check is to be executed for certain Abschlussprüfung
-	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
-	 */
-	private function _getInvalidAbschlusspruefungen(
-		$studiensemester_kurzbz = null,
-		$studiengang_kz = null,
-		$abschlusspruefung_id = null,
-		$exkludierte_studiengang_kz = null
-	) {
-		$params = array();
-
-		$qry = "
-			SELECT
-				pre.person_id, pre.prestudent_id,
-				pruefung.sponsion, pruefung.datum, pruefung.abschlusspruefung_id,
-				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
-			FROM
-				public.tbl_prestudent pre
-				JOIN public.tbl_student stud USING(prestudent_id)
-				JOIN public.tbl_prestudentstatus prestatus USING(prestudent_id)
-				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
-				JOIN lehre.tbl_abschlusspruefung pruefung ON stud.student_uid = pruefung.student_uid
-			WHERE
-				status_kurzbz = 'Absolvent'
-				AND NOT EXISTS ( /* exclude gs */
-					SELECT 1
-					FROM bis.tbl_mobilitaet
-					WHERE prestudent_id = pre.prestudent_id
-					AND studiensemester_kurzbz = prestatus.studiensemester_kurzbz
-				)
-				AND abschlussbeurteilung_kurzbz!='nicht'
-				AND abschlussbeurteilung_kurzbz IS NOT NULL
-				AND (pruefung.datum IS NULL OR pruefung.sponsion IS NULL)
-				AND pre.bismelden
-				AND stg.melderelevant";
-
-		if (isset($studiensemester_kurzbz))
-		{
-			$qry .= " AND prestatus.studiensemester_kurzbz = ?";
-			$params[] = $studiensemester_kurzbz;
-		}
-
-		if (isset($studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz = ?";
-			$params[] = $studiengang_kz;
-		}
-
-		if (isset($abschlusspruefung_id))
-		{
-			$qry .= " AND pruefung.abschlusspruefung_id = ?";
-			$params[] = $abschlusspruefung_id;
-		}
-
-		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
-		{
-			$qry .= " AND stg.studiengang_kz NOT IN ?";
-			$params[] = $exkludierte_studiengang_kz;
-		}
-
-		return $this->_db->execReadOnlyQuery($qry, $params);
-	}
-
-	/**
-	 * Gets Bismeldedate from Studiensemester.
-	 * @param studiensemester_kurzbz string
-	 */
-	private function _getBisdateFromSemester($studiensemester_kurzbz)
-	{
-		$semesterYear = substr($studiensemester_kurzbz, 2, 6);
-		$semesterType = substr($studiensemester_kurzbz, 0, 2);
-
-		if ($semesterType == 'SS')
-		{
-			return date_format(date_create(($semesterYear - 1)."-11-15"), 'Y-m-d');
-		}
-
-		if ($semesterType == 'WS')
-		{
-			return date_format(date_create($semesterYear."-04-15"), 'Y-m-d');
-		}
-	}
-}
diff --git a/application/libraries/issues/plausichecks/AbbrecherAktiv.php b/application/libraries/issues/plausichecks/AbbrecherAktiv.php
index caa8dd91c..9eae389b5 100644
--- a/application/libraries/issues/plausichecks/AbbrecherAktiv.php
+++ b/application/libraries/issues/plausichecks/AbbrecherAktiv.php
@@ -20,7 +20,7 @@ class AbbrecherAktiv extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getAbbrecherAktiv($studiengang_kz, null, $exkludierte_studiengang_kz);
+		$prestudentRes = $this->getAbbrecherAktiv($studiengang_kz, null, $exkludierte_studiengang_kz);
 
 		if (isError($prestudentRes)) return $prestudentRes;
 
@@ -43,4 +43,49 @@ class AbbrecherAktiv extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Abbrecher cannot be active.
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getAbbrecherAktiv($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
+	{
+		$params = array();
+
+		$qry = "
+			SELECT
+				pre.person_id, pre.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_prestudentstatus pre_status
+				JOIN public.tbl_prestudent pre USING(prestudent_id)
+				JOIN public.tbl_student student USING(prestudent_id)
+				JOIN public.tbl_benutzer benutzer on(benutzer.uid=student.student_uid)
+				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
+			WHERE
+				pre_status.status_kurzbz ='Abbrecher'
+				AND benutzer.aktiv=true";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND pre.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/AbschlussstatusFehlt.php b/application/libraries/issues/plausichecks/AbschlussstatusFehlt.php
index e7894c7a8..3690e1331 100644
--- a/application/libraries/issues/plausichecks/AbschlussstatusFehlt.php
+++ b/application/libraries/issues/plausichecks/AbschlussstatusFehlt.php
@@ -21,7 +21,7 @@ class AbschlussstatusFehlt extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getAbschlussstatusFehlt(
+		$prestudentRes = $this->getAbschlussstatusFehlt(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -49,4 +49,95 @@ class AbschlussstatusFehlt extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Prestudent should have a final status.
+	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getAbschlussstatusFehlt(
+		$studiensemester_kurzbz = null,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array();
+
+		$qry = "
+			SELECT
+				DISTINCT ON (pre.prestudent_id)
+				pre.person_id, pre.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, status.studiensemester_kurzbz
+			FROM
+				public.tbl_prestudent pre
+				JOIN public.tbl_person USING(person_id)
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_studiengang stg USING(studiengang_kz)
+			WHERE
+				NOT EXISTS( /*student does not study anymore*/
+					SELECT
+						1
+					FROM
+						public.tbl_prestudentstatus ps
+						JOIN public.tbl_studiensemester USING(studiensemester_kurzbz)
+					WHERE
+						prestudent_id=pre.prestudent_id
+						/* 4 months: There might be Diplomanden, in summer months end status is often not entered yet */
+						AND tbl_studiensemester.ende>now() - interval '4 months'
+				)
+				/* check only valid begininng with 2018 */
+				AND '2018-01-01'<(SELECT max(datum) FROM public.tbl_prestudentstatus WHERE prestudent_id=pre.prestudent_id)
+				AND NOT EXISTS( /* no end status */
+					SELECT 1
+					FROM public.tbl_prestudentstatus ps
+					WHERE
+						prestudent_id=pre.prestudent_id
+						AND status_kurzbz IN('Abbrecher','Abgewiesener','Absolvent','Incoming')
+				)
+				AND stg.melderelevant
+				AND pre.bismelden";
+
+		if (isset($studiensemester_kurzbz))
+		{
+			$prevStudiensemesterRes = $this->_ci->StudiensemesterModel->getPreviousFrom($studiensemester_kurzbz);
+
+			if (isError($prevStudiensemesterRes)) return $prevStudiensemesterRes;
+
+			if (hasData($prevStudiensemesterRes))
+			{
+				// if Studiensemester given, check only if has status in current or previous semester
+				$prevStudiensemester = getData($prevStudiensemesterRes)[0]->studiensemester_kurzbz;
+				$qry .= " AND EXISTS (
+							SELECT 1
+							FROM public.tbl_prestudentstatus ps
+							WHERE studiensemester_kurzbz IN (?, ?)
+							AND ps.prestudent_id = pre.prestudent_id
+						)";
+				$params[] = $prevStudiensemester;
+				$params[] = $studiensemester_kurzbz;
+			}
+		}
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND pre.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/AktSemesterNull.php b/application/libraries/issues/plausichecks/AktSemesterNull.php
index fa251a95e..1223a2720 100644
--- a/application/libraries/issues/plausichecks/AktSemesterNull.php
+++ b/application/libraries/issues/plausichecks/AktSemesterNull.php
@@ -21,7 +21,7 @@ class AktSemesterNull extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getAktSemesterNull($studiensemester_kurzbz, $studiengang_kz, null, $exkludierte_studiengang_kz);
+		$prestudentRes = $this->getAktSemesterNull($studiensemester_kurzbz, $studiengang_kz, null, $exkludierte_studiengang_kz);
 
 		if (isError($prestudentRes)) return $prestudentRes;
 
@@ -50,4 +50,51 @@ class AktSemesterNull extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Current Ausbildungssemester shouldn't be 0.
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getAktSemesterNull($studiensemester_kurzbz, $studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
+	{
+		$params = array($studiensemester_kurzbz);
+
+		$qry = "
+			SELECT
+				DISTINCT pre.person_id, pre.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, prestat.studiensemester_kurzbz
+			FROM
+				public.tbl_prestudent pre
+				JOIN public.tbl_prestudentstatus prestat USING(prestudent_id)
+				JOIN public.tbl_studiengang stg USING(studiengang_kz)
+			WHERE
+				prestat.status_kurzbz != 'Incoming'
+				AND prestat.studiensemester_kurzbz = ?
+				AND ausbildungssemester = 0
+				AND stg.melderelevant
+				AND pre.bismelden";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND pre.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/AktiverStudentOhneStatus.php b/application/libraries/issues/plausichecks/AktiverStudentOhneStatus.php
index 225c6242f..94fe5cc8d 100644
--- a/application/libraries/issues/plausichecks/AktiverStudentOhneStatus.php
+++ b/application/libraries/issues/plausichecks/AktiverStudentOhneStatus.php
@@ -20,7 +20,7 @@ class AktiverStudentOhneStatus extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getAktiverStudentOhneStatus($studiengang_kz, null, $exkludierte_studiengang_kz);
+		$prestudentRes = $this->getAktiverStudentOhneStatus($studiengang_kz, null, $exkludierte_studiengang_kz);
 
 		if (isError($prestudentRes)) return $prestudentRes;
 
@@ -43,4 +43,57 @@ class AktiverStudentOhneStatus extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Students with active Benutzer should have a status in the current semester.
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getAktiverStudentOhneStatus($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
+	{
+		$params = array();
+
+		$qry = "
+			SELECT
+				DISTINCT (student_uid), prestudent.person_id, prestudent.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_student student
+				JOIN public.tbl_benutzer benutzer on (benutzer.uid = student.student_uid)
+				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
+				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
+			WHERE
+				benutzer.aktiv=TRUE
+				AND stg.melderelevant
+				AND prestudent.bismelden
+				AND NOT EXISTS (
+					SELECT 1
+					FROM public.tbl_prestudentstatus
+					JOIN public.tbl_studiensemester sem USING (studiensemester_kurzbz)
+					WHERE prestudent_id = prestudent.prestudent_id
+					/* buffer of four months, as status are often entered later */
+					AND sem.ende::date > NOW() - interval '4 months'
+				)";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND prestudent.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/AktiverStudentstatusOhneKontobuchung.php b/application/libraries/issues/plausichecks/AktiverStudentstatusOhneKontobuchung.php
index a9b30a1d2..28684388f 100644
--- a/application/libraries/issues/plausichecks/AktiverStudentstatusOhneKontobuchung.php
+++ b/application/libraries/issues/plausichecks/AktiverStudentstatusOhneKontobuchung.php
@@ -21,7 +21,7 @@ class AktiverStudentstatusOhneKontobuchung extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getAktiverStudentstatusOhneKontobuchung(
+		$prestudentRes = $this->getAktiverStudentstatusOhneKontobuchung(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -55,4 +55,66 @@ class AktiverStudentstatusOhneKontobuchung extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Student with active status should have been charged, i.e. have a Kontobuchung with a negative or zero value.
+	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getAktiverStudentstatusOhneKontobuchung(
+		$studiensemester_kurzbz,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array($studiensemester_kurzbz);
+
+		$qry = "
+			SELECT
+				DISTINCT ON (pre.prestudent_id)
+				pre.person_id, pre.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, status.studiensemester_kurzbz
+			FROM
+				public.tbl_prestudent pre
+				JOIN public.tbl_person pers USING(person_id)
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_studiengang stg USING(studiengang_kz)
+			WHERE
+				status.studiensemester_kurzbz = ?
+				AND status.status_kurzbz IN ('Student', 'Incoming')
+				AND NOT EXISTS (
+					SELECT 1
+					FROM
+						public.tbl_konto
+					WHERE
+						person_id = pers.person_id
+						AND studiensemester_kurzbz = status.studiensemester_kurzbz
+						AND buchungsnr_verweis IS NULL
+						AND betrag <= 0
+				)
+				AND stg.melderelevant
+				AND pre.bismelden";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND pre.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/AusbildungssemPrestudentUngleichAusbildungssemStatus.php b/application/libraries/issues/plausichecks/AusbildungssemPrestudentUngleichAusbildungssemStatus.php
index 3462685ab..00ff16ae0 100644
--- a/application/libraries/issues/plausichecks/AusbildungssemPrestudentUngleichAusbildungssemStatus.php
+++ b/application/libraries/issues/plausichecks/AusbildungssemPrestudentUngleichAusbildungssemStatus.php
@@ -21,7 +21,7 @@ class AusbildungssemPrestudentUngleichAusbildungssemStatus extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getAusbildungssemPrestudentUngleichAusbildungssemStatus(
+		$prestudentRes = $this->getAusbildungssemPrestudentUngleichAusbildungssemStatus(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -58,4 +58,59 @@ class AusbildungssemPrestudentUngleichAusbildungssemStatus extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Ausbildungssemester of prestudent (lehrverband) must be the same as Ausbildungssemester of prestudentstatus.
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getAusbildungssemPrestudentUngleichAusbildungssemStatus(
+		$studiensemester_kurzbz,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array($studiensemester_kurzbz, $studiensemester_kurzbz, $studiensemester_kurzbz);
+
+		$qry = "
+			SELECT
+				DISTINCT(student.student_uid), student.student_uid, prestudent.person_id, prestudent.prestudent_id,
+				status.ausbildungssemester AS status_ausbildungssemester, lv.semester AS student_ausbildungssemester, status.studiensemester_kurzbz,
+				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_student student
+				JOIN public.tbl_studentlehrverband lv USING(student_uid)
+				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
+			WHERE
+				status.studiensemester_kurzbz = ?
+				AND lv.studiensemester_kurzbz = ?
+				AND status.status_kurzbz NOT IN ('Interessent','Bewerber','Aufgenommener','Wartender','Abgewiesener','Unterbrecher')
+				AND get_rolle_prestudent (prestudent_id, ?)='Student'
+				AND status.ausbildungssemester != lv.semester";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND prestudent.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/BewerberNichtZumRtAngetreten.php b/application/libraries/issues/plausichecks/BewerberNichtZumRtAngetreten.php
index a1b1941dd..4a9655d13 100644
--- a/application/libraries/issues/plausichecks/BewerberNichtZumRtAngetreten.php
+++ b/application/libraries/issues/plausichecks/BewerberNichtZumRtAngetreten.php
@@ -21,7 +21,7 @@ class BewerberNichtZumRtAngetreten extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getBewerberNichtZumRtAngetreten(
+		$prestudentRes = $this->getBewerberNichtZumRtAngetreten(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -52,4 +52,72 @@ class BewerberNichtZumRtAngetreten extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Bewerber should have participated in Reihungstest.
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getBewerberNichtZumRtAngetreten(
+		$studiensemester_kurzbz,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$this->_ci->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
+		$previousStudiensemesterRes = $this->_ci->StudiensemesterModel->getPreviousFrom($studiensemester_kurzbz);
+
+		if (isError($previousStudiensemesterRes)) return $previousStudiensemesterRes;
+
+		$params = array($studiensemester_kurzbz);
+
+		$qry = "
+			SELECT
+				prestudent.person_id, prestudent.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, status.studiensemester_kurzbz
+			FROM
+				public.tbl_prestudent prestudent
+				JOIN public.tbl_prestudentstatus status ON(prestudent.prestudent_id=status.prestudent_id)
+				JOIN public.tbl_person USING(person_id)
+				LEFT JOIN bis.tbl_orgform USING(orgform_kurzbz)
+				JOIN public.tbl_studiengang stg USING(studiengang_kz)
+			WHERE
+				status_kurzbz='Bewerber'
+				AND reihungstestangetreten=false
+				AND stg.melderelevant
+				AND prestudent.bismelden";
+
+		if (hasData($previousStudiensemesterRes))
+		{
+			$previousStudiensemester = getData($previousStudiensemesterRes)[0]->studiensemester_kurzbz;
+			$qry .= " AND (studiensemester_kurzbz=? OR studiensemester_kurzbz=?)";
+			$params[] = $previousStudiensemester;
+		}
+		else
+		{
+			$qry .= " AND studiensemester_kurzbz=?";
+		}
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND prestudent.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/DatumAbschlusspruefungFehlt.php b/application/libraries/issues/plausichecks/DatumAbschlusspruefungFehlt.php
index 0d66324fb..f606e2c8c 100644
--- a/application/libraries/issues/plausichecks/DatumAbschlusspruefungFehlt.php
+++ b/application/libraries/issues/plausichecks/DatumAbschlusspruefungFehlt.php
@@ -21,7 +21,7 @@ class DatumAbschlusspruefungFehlt extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getDatumAbschlusspruefungFehlt(
+		$prestudentRes = $this->getDatumAbschlusspruefungFehlt(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -52,4 +52,72 @@ class DatumAbschlusspruefungFehlt extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Date of final exam shouldn't be missing for Absolvent.
+	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param abschlusspruefung_id int if check is to be executed for a certain Abschlussprüfung
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getDatumAbschlusspruefungFehlt(
+		$studiensemester_kurzbz = null,
+		$studiengang_kz = null,
+		$abschlusspruefung_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array();
+
+		$qry = "
+			SELECT
+				pre.person_id, pre.prestudent_id,
+				pruefung.sponsion, pruefung.datum, pruefung.abschlusspruefung_id,
+				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_prestudent pre
+				JOIN public.tbl_student stud USING(prestudent_id)
+				JOIN public.tbl_prestudentstatus prestatus USING(prestudent_id)
+				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
+				JOIN lehre.tbl_abschlusspruefung pruefung ON stud.student_uid = pruefung.student_uid
+			WHERE
+				status_kurzbz = 'Absolvent'
+				AND NOT EXISTS ( /* exclude gs */
+					SELECT 1
+					FROM bis.tbl_mobilitaet
+					WHERE prestudent_id = pre.prestudent_id
+					AND studiensemester_kurzbz = prestatus.studiensemester_kurzbz
+				)
+				AND abschlussbeurteilung_kurzbz!='nicht'
+				AND abschlussbeurteilung_kurzbz IS NOT NULL
+				AND pruefung.datum IS NULL
+				AND pre.bismelden
+				AND stg.melderelevant";
+
+		if (isset($studiensemester_kurzbz))
+		{
+			$qry .= " AND prestatus.studiensemester_kurzbz = ?";
+			$params[] = $studiensemester_kurzbz;
+		}
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($abschlusspruefung_id))
+		{
+			$qry .= " AND pruefung.abschlusspruefung_id = ?";
+			$params[] = $abschlusspruefung_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/DatumSponsionFehlt.php b/application/libraries/issues/plausichecks/DatumSponsionFehlt.php
index 719afc2e2..210ae6f01 100644
--- a/application/libraries/issues/plausichecks/DatumSponsionFehlt.php
+++ b/application/libraries/issues/plausichecks/DatumSponsionFehlt.php
@@ -21,7 +21,7 @@ class DatumSponsionFehlt extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getDatumSponsionFehlt(
+		$prestudentRes = $this->getDatumSponsionFehlt(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -52,4 +52,72 @@ class DatumSponsionFehlt extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Date of sponsion shouldn't be missing for Absolvent.
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param abschlusspruefung_id int if check is to be executed only for a certain Abschlussprüfung
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getDatumSponsionFehlt(
+		$studiensemester_kurzbz = null,
+		$studiengang_kz = null,
+		$abschlusspruefung_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array();
+
+		$qry = "
+			SELECT
+				pre.person_id, pre.prestudent_id,
+				pruefung.sponsion, pruefung.datum, pruefung.abschlusspruefung_id,
+				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_prestudent pre
+				JOIN public.tbl_student stud USING(prestudent_id)
+				JOIN public.tbl_prestudentstatus prestatus USING(prestudent_id)
+				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
+				JOIN lehre.tbl_abschlusspruefung pruefung ON stud.student_uid = pruefung.student_uid
+			WHERE
+				status_kurzbz = 'Absolvent'
+				AND NOT EXISTS ( /* exclude gs */
+					SELECT 1
+					FROM bis.tbl_mobilitaet
+					WHERE prestudent_id = pre.prestudent_id
+					AND studiensemester_kurzbz = prestatus.studiensemester_kurzbz
+				)
+				AND abschlussbeurteilung_kurzbz!='nicht'
+				AND abschlussbeurteilung_kurzbz IS NOT NULL
+				AND pruefung.sponsion IS NULL
+				AND pre.bismelden
+				AND stg.melderelevant";
+
+		if (isset($studiensemester_kurzbz))
+		{
+			$qry .= " AND prestatus.studiensemester_kurzbz = ?";
+			$params[] = $studiensemester_kurzbz;
+		}
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($abschlusspruefung_id))
+		{
+			$qry .= " AND pruefung.abschlusspruefung_id = ?";
+			$params[] = $abschlusspruefung_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/DatumStudiensemesterFalscheReihenfolge.php b/application/libraries/issues/plausichecks/DatumStudiensemesterFalscheReihenfolge.php
index e1f01f735..381bea7df 100644
--- a/application/libraries/issues/plausichecks/DatumStudiensemesterFalscheReihenfolge.php
+++ b/application/libraries/issues/plausichecks/DatumStudiensemesterFalscheReihenfolge.php
@@ -20,7 +20,7 @@ class DatumStudiensemesterFalscheReihenfolge extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getDatumStudiensemesterFalscheReihenfolge($studiengang_kz, null, $exkludierte_studiengang_kz);
+		$prestudentRes = $this->getDatumStudiensemesterFalscheReihenfolge($studiengang_kz, null, $exkludierte_studiengang_kz);
 
 		if (isError($prestudentRes)) return $prestudentRes;
 
@@ -45,4 +45,64 @@ class DatumStudiensemesterFalscheReihenfolge extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Status Dates and status studysemester dates should be in correct order.
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if check is to be executed only for certain Studiengaenge
+	 * @return success with prestudents or error
+	 */
+	public function getDatumStudiensemesterFalscheReihenfolge($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
+	{
+		$params = array();
+
+		// all active students with Status student in current semester
+		$qry = "
+			SELECT DISTINCT ON (prestudent_id) *
+			FROM (
+				SELECT
+					prestudent.person_id, prestudent.prestudent_id,
+					stg.studiengang_kz, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz,
+					ROW_NUMBER () OVER (
+						PARTITION BY prestudent.prestudent_id
+						ORDER BY sem.start DESC, status.datum DESC, status.insertamum DESC, status.ext_id DESC
+					) AS reihenfolge_semester,
+					ROW_NUMBER () OVER (
+						PARTITION BY prestudent.prestudent_id
+						ORDER BY status.datum DESC, status.insertamum DESC, status.ext_id DESC
+					) AS reihenfolge_datum
+				FROM
+					public.tbl_student student
+					JOIN public.tbl_benutzer benutzer on(student.student_uid = benutzer.uid)
+					JOIN public.tbl_prestudent prestudent USING(prestudent_id)
+					JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+					JOIN public.tbl_studiensemester sem USING(studiensemester_kurzbz)
+					JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
+				WHERE
+					benutzer.aktiv=true
+					AND status.status_kurzbz='Student'
+			) reihenfolge
+			WHERE reihenfolge_semester <> reihenfolge_datum";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/FalscheAnzahlAbschlusspruefungen.php b/application/libraries/issues/plausichecks/FalscheAnzahlAbschlusspruefungen.php
index 68b67ec29..1021fe85a 100644
--- a/application/libraries/issues/plausichecks/FalscheAnzahlAbschlusspruefungen.php
+++ b/application/libraries/issues/plausichecks/FalscheAnzahlAbschlusspruefungen.php
@@ -21,7 +21,7 @@ class FalscheAnzahlAbschlusspruefungen extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getFalscheAnzahlAbschlusspruefungen(
+		$prestudentRes = $this->getFalscheAnzahlAbschlusspruefungen(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -49,4 +49,77 @@ class FalscheAnzahlAbschlusspruefungen extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Students with finished studies should have exactly one final exam.
+	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getFalscheAnzahlAbschlusspruefungen(
+		$studiensemester_kurzbz = null,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array();
+
+		$qry = "
+			SELECT * FROM (
+				SELECT
+					DISTINCT ON(pre.prestudent_id) pre.person_id, pre.prestudent_id, student_uid, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz,
+					(
+						SELECT COUNT(*)
+						FROM lehre.tbl_abschlusspruefung
+						WHERE student_uid = stud.student_uid
+						AND abschlussbeurteilung_kurzbz != 'nicht'
+						AND abschlussbeurteilung_kurzbz IS NOT NULL
+					) AS anzahl_abschlusspruefungen
+				FROM
+					public.tbl_prestudent pre
+					JOIN public.tbl_student stud USING(prestudent_id)
+					JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+					JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
+				WHERE
+					status_kurzbz = 'Absolvent'
+					AND pre.bismelden
+					AND stg.melderelevant
+					AND NOT EXISTS ( /* exclude gs */
+						SELECT 1
+						FROM bis.tbl_mobilitaet
+						WHERE prestudent_id = pre.prestudent_id
+						AND studiensemester_kurzbz = status.studiensemester_kurzbz
+					)";
+
+		if (isset($studiensemester_kurzbz))
+		{
+			$qry .= " AND status.studiensemester_kurzbz = ?";
+			$params[] = $studiensemester_kurzbz;
+		}
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND pre.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		$qry .= ") studenten
+			WHERE anzahl_abschlusspruefungen != 1";
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/FalscheAnzahlHeimatadressen.php b/application/libraries/issues/plausichecks/FalscheAnzahlHeimatadressen.php
index f3189eaa5..b3551904e 100644
--- a/application/libraries/issues/plausichecks/FalscheAnzahlHeimatadressen.php
+++ b/application/libraries/issues/plausichecks/FalscheAnzahlHeimatadressen.php
@@ -21,7 +21,7 @@ class FalscheAnzahlHeimatadressen extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$personRes = $this->_ci->plausichecklib->getFalscheAnzahlHeimatadressen(
+		$personRes = $this->getFalscheAnzahlHeimatadressen(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -47,4 +47,67 @@ class FalscheAnzahlHeimatadressen extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Students should have exactly one home address.
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param person_id int if check is to be executed only for one person
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getFalscheAnzahlHeimatadressen(
+		$studiensemester_kurzbz = null,
+		$studiengang_kz = null,
+		$person_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array();
+
+		$qry = "
+			SELECT
+				DISTINCT person_id
+			FROM
+				(
+					SELECT person_id, COUNT(adresse_id) AS anzahl_adressen
+					FROM public.tbl_adresse addr
+					WHERE heimatadresse IS TRUE
+					GROUP BY person_id
+				) adressen
+				JOIN public.tbl_person USING(person_id)
+				JOIN public.tbl_prestudent pre USING(person_id)
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_student USING(prestudent_id)
+				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
+			WHERE
+				anzahl_adressen != 1
+				AND stg.melderelevant
+				AND pre.bismelden";
+
+		if (isset($studiensemester_kurzbz))
+		{
+			$qry .= " AND status.studiensemester_kurzbz = ?";
+			$params[] = $studiensemester_kurzbz;
+		}
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($person_id))
+		{
+			$qry .= " AND person_id = ?";
+			$params[] = $person_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/FalscheAnzahlZustelladressen.php b/application/libraries/issues/plausichecks/FalscheAnzahlZustelladressen.php
index 1fb974aa1..9d72b0236 100644
--- a/application/libraries/issues/plausichecks/FalscheAnzahlZustelladressen.php
+++ b/application/libraries/issues/plausichecks/FalscheAnzahlZustelladressen.php
@@ -21,7 +21,7 @@ class FalscheAnzahlZustelladressen extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$personRes = $this->_ci->plausichecklib->getFalscheAnzahlZustelladressen(
+		$personRes = $this->getFalscheAnzahlZustelladressen(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -47,4 +47,67 @@ class FalscheAnzahlZustelladressen extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Students should have exactly one delivery address.
+	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param person_id int if check is to be executed only for one person
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getFalscheAnzahlZustelladressen(
+		$studiensemester_kurzbz = null,
+		$studiengang_kz = null,
+		$person_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array();
+
+		$qry = "
+			SELECT
+				DISTINCT person_id
+			FROM
+				(
+					SELECT person_id, COUNT(adresse_id) AS anzahl_adressen
+					FROM public.tbl_adresse addr
+					WHERE zustelladresse IS TRUE
+					GROUP BY person_id
+				) adressen
+				JOIN public.tbl_person USING(person_id)
+				JOIN public.tbl_prestudent pre USING(person_id)
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_student USING(prestudent_id)
+				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
+			WHERE
+				anzahl_adressen != 1
+				AND stg.melderelevant
+				AND pre.bismelden";
+
+		if (isset($studiensemester_kurzbz))
+		{
+			$qry .= " AND status.studiensemester_kurzbz = ?";
+			$params[] = $studiensemester_kurzbz;
+		}
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($person_id))
+		{
+			$qry .= " AND person_id = ?";
+			$params[] = $person_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/GbDatumWeitZurueck.php b/application/libraries/issues/plausichecks/GbDatumWeitZurueck.php
index 5b7326986..a9e9f817a 100644
--- a/application/libraries/issues/plausichecks/GbDatumWeitZurueck.php
+++ b/application/libraries/issues/plausichecks/GbDatumWeitZurueck.php
@@ -21,7 +21,7 @@ class GbDatumWeitZurueck extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$personRes = $this->_ci->plausichecklib->getGbDatumWeitZurueck($studiensemester_kurzbz, $studiengang_kz, null, $exkludierte_studiengang_kz);
+		$personRes = $this->getGbDatumWeitZurueck($studiensemester_kurzbz, $studiengang_kz, null, $exkludierte_studiengang_kz);
 
 		if (isError($personRes)) return $personRes;
 
@@ -42,4 +42,63 @@ class GbDatumWeitZurueck extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Birthdate is too long ago.
+	 * @param studiensemester_kurzbz string if check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param person_id int if check is to be executed only for one person
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getGbDatumWeitZurueck(
+		$studiensemester_kurzbz = null,
+		$studiengang_kz = null,
+		$person_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array();
+
+		$qry = "
+			SELECT
+				pers.person_id
+			FROM
+				public.tbl_person pers
+			WHERE
+				pers.gebdatum < '1920-01-01'
+				AND EXISTS (
+					SELECT 1
+					FROM public.tbl_prestudent
+					JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+					JOIN public.tbl_studiengang stg USING(studiengang_kz)
+					WHERE person_id = pers.person_id";
+
+		if (isset($studiensemester_kurzbz))
+		{
+			$qry .= " AND status.studiensemester_kurzbz = ?";
+			$params[] = $studiensemester_kurzbz;
+		}
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		$qry .= ")";
+
+		if (isset($person_id))
+		{
+			$qry .= " AND pers.person_id = ?";
+			$params[] = $person_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/InaktiverStudentAktiverStatus.php b/application/libraries/issues/plausichecks/InaktiverStudentAktiverStatus.php
index 559d31263..dead2b1e7 100644
--- a/application/libraries/issues/plausichecks/InaktiverStudentAktiverStatus.php
+++ b/application/libraries/issues/plausichecks/InaktiverStudentAktiverStatus.php
@@ -21,7 +21,7 @@ class InaktiverStudentAktiverStatus extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getInaktiverStudentAktiverStatus(
+		$prestudentRes = $this->getInaktiverStudentAktiverStatus(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -52,4 +52,62 @@ class InaktiverStudentAktiverStatus extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Students with active status should have an active Benutzer.
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getInaktiverStudentAktiverStatus(
+		$studiensemester_kurzbz,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$aktStudiensemesterRes = $this->_ci->StudiensemesterModel->getAkt();
+
+		if (isError($aktStudiensemesterRes)) return $aktStudiensemesterRes;
+
+		$studiensemester_kurzbz = hasData($aktStudiensemesterRes) ? getData($aktStudiensemesterRes)[0]->studiensemester_kurzbz : '';
+
+		$params = array($studiensemester_kurzbz);
+
+		$qry = "
+			SELECT
+				DISTINCT(student.student_uid), prestudent.person_id, prestudent.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_benutzer benutzer
+				JOIN public.tbl_student student on(benutzer.uid = student.student_uid)
+				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
+				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
+			WHERE
+				benutzer.aktiv=false
+				AND EXISTS (SELECT 1 FROM public.tbl_prestudentstatus WHERE prestudent_id = prestudent.prestudent_id AND studiensemester_kurzbz = ?)
+				AND get_rolle_prestudent(prestudent_id, NULL) IN ('Student', 'Diplomand', 'Unterbrecher', 'Praktikant')
+				AND stg.melderelevant
+				AND prestudent.bismelden";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND prestudent.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/IncomingHeimatNationOesterreich.php b/application/libraries/issues/plausichecks/IncomingHeimatNationOesterreich.php
index 113416486..5276164dc 100644
--- a/application/libraries/issues/plausichecks/IncomingHeimatNationOesterreich.php
+++ b/application/libraries/issues/plausichecks/IncomingHeimatNationOesterreich.php
@@ -21,7 +21,7 @@ class IncomingHeimatNationOesterreich extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$personRes = $this->_ci->plausichecklib->getIncomingHeimatNationOesterreich(
+		$personRes = $this->getIncomingHeimatNationOesterreich(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -47,4 +47,58 @@ class IncomingHeimatNationOesterreich extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Incoming shouldn't have austrian home address.
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param person_id int if check is to be executed only for one person
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getIncomingHeimatNationOesterreich(
+		$studiensemester_kurzbz,
+		$studiengang_kz = null,
+		$person_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array($studiensemester_kurzbz);
+
+		$qry = "
+			SELECT
+				DISTINCT pers.person_id, status.studiensemester_kurzbz
+			FROM
+				public.tbl_prestudent pre
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_person pers USING(person_id)
+				JOIN public.tbl_adresse addr USING(person_id)
+				JOIN public.tbl_studiengang stg USING(studiengang_kz)
+			WHERE
+				status.status_kurzbz = 'Incoming'
+				AND addr.nation = 'A'
+				AND addr.heimatadresse
+				AND status.studiensemester_kurzbz = ?
+				AND stg.melderelevant
+				AND pre.bismelden";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($person_id))
+		{
+			$qry .= " AND pers.person_id = ?";
+			$params[] = $person_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/IncomingOhneIoDatensatz.php b/application/libraries/issues/plausichecks/IncomingOhneIoDatensatz.php
index 6eaa9db3f..e08280f83 100644
--- a/application/libraries/issues/plausichecks/IncomingOhneIoDatensatz.php
+++ b/application/libraries/issues/plausichecks/IncomingOhneIoDatensatz.php
@@ -20,7 +20,7 @@ class IncomingOhneIoDatensatz extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getIncomingOhneIoDatensatz($studiengang_kz, null, $exkludierte_studiengang_kz);
+		$prestudentRes = $this->getIncomingOhneIoDatensatz($studiengang_kz, null, $exkludierte_studiengang_kz);
 
 		if (isError($prestudentRes)) return $prestudentRes;
 
@@ -43,4 +43,54 @@ class IncomingOhneIoDatensatz extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Incoming should have IN/OUT data.
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getIncomingOhneIoDatensatz($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
+	{
+		$params = array();
+
+		$qry = "
+			SELECT
+				DISTINCT ON(student_uid, nachname, vorname)
+				tbl_person.person_id,
+				tbl_prestudent.prestudent_id,
+				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_student
+				JOIN public.tbl_benutzer ON(student_uid=uid)
+				JOIN public.tbl_person USING(person_id)
+				JOIN public.tbl_prestudent USING(prestudent_id)
+				JOIN public.tbl_prestudentstatus ON(tbl_prestudent.prestudent_id=tbl_prestudentstatus.prestudent_id)
+				JOIN public.tbl_studiengang stg ON(stg.studiengang_kz=tbl_student.studiengang_kz)
+			WHERE
+				bismelden=TRUE
+				AND status_kurzbz='Incoming' AND NOT EXISTS (SELECT 1 FROM bis.tbl_bisio WHERE student_uid=tbl_student.student_uid)
+				AND stg.melderelevant";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND tbl_prestudent.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/IncomingOrGsFoerderrelevant.php b/application/libraries/issues/plausichecks/IncomingOrGsFoerderrelevant.php
index 23002b71b..4d789f71a 100644
--- a/application/libraries/issues/plausichecks/IncomingOrGsFoerderrelevant.php
+++ b/application/libraries/issues/plausichecks/IncomingOrGsFoerderrelevant.php
@@ -21,7 +21,7 @@ class IncomingOrGsFoerderrelevant extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getIncomingOrGsFoerderrelevant(
+		$prestudentRes = $this->getIncomingOrGsFoerderrelevant(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -49,4 +49,77 @@ class IncomingOrGsFoerderrelevant extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Incoming or gemeinsame Studien students should not receive funding (not be förderrelevant).
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return object success or error
+	 */
+	public function getIncomingOrGsFoerderrelevant(
+		$studiensemester_kurzbz = null,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array();
+
+		$qry = "
+			SELECT
+				DISTINCT ON(prestudent_id)
+				pers.person_id,
+				ps.prestudent_id,
+				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_student stud
+				JOIN public.tbl_benutzer ON(student_uid=uid)
+				JOIN public.tbl_person pers USING(person_id)
+				JOIN public.tbl_prestudent ps USING(prestudent_id)
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_studiengang stg ON(stg.studiengang_kz=stud.studiengang_kz)
+			WHERE
+				(
+					status.status_kurzbz = 'Incoming'
+					OR EXISTS (
+						SELECT 1
+						FROM
+							bis.tbl_mobilitaet
+							JOIN public.tbl_prestudent USING(prestudent_id)
+						WHERE
+							prestudent_id = ps.prestudent_id
+							AND gsstudientyp_kurzbz = 'Extern'
+					)
+				)
+				AND (ps.foerderrelevant <> FALSE OR ps.foerderrelevant IS NULL)
+				AND bismelden=TRUE
+				AND stg.melderelevant";
+
+		if (isset($studiensemester_kurzbz))
+		{
+			$qry .= " AND status.studiensemester_kurzbz = ?";
+			$params[] = $studiensemester_kurzbz;
+		}
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND ps.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/InskriptionVorLetzerBismeldung.php b/application/libraries/issues/plausichecks/InskriptionVorLetzerBismeldung.php
index d977b4124..871b3b3d4 100644
--- a/application/libraries/issues/plausichecks/InskriptionVorLetzerBismeldung.php
+++ b/application/libraries/issues/plausichecks/InskriptionVorLetzerBismeldung.php
@@ -21,7 +21,7 @@ class InskriptionVorLetzerBismeldung extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getInskriptionVorLetzerBismeldung(
+		$prestudentRes = $this->getInskriptionVorLetzerBismeldung(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -56,4 +56,93 @@ class InskriptionVorLetzerBismeldung extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Students of a semester shouldn't start studies before the date of Bismeldung.
+	 * e.g. If student studies in WS2022 datum of status shouldn't be before 15.4.2020
+	 * e.g. If student studies in SS2022 datum of status shouldn't be before 15.11.2022
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getInskriptionVorLetzerBismeldung(
+		$studiensemester_kurzbz,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		// get Bismeldedatum
+		$datumBis = $this->_getBisdateFromSemester($studiensemester_kurzbz);
+
+		$params = array($datumBis, $studiensemester_kurzbz, $datumBis);
+
+		// get active students
+		$qry = "
+			SELECT
+				DISTINCT ON (student.student_uid) ? AS datum_bismeldung,
+				prestudent.person_id, prestudent.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, status.studiensemester_kurzbz
+			FROM
+				public.tbl_benutzer benutzer
+				JOIN public.tbl_student student on(benutzer.uid = student.student_uid)
+				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
+			WHERE
+				benutzer.aktiv=true
+				AND status.studiensemester_kurzbz = ?
+				/* inscription date before date of first student status */
+				AND (
+					SELECT datum
+					FROM public.tbl_prestudentstatus
+					WHERE prestudent_id = prestudent.prestudent_id
+					AND studiensemester_kurzbz = status.studiensemester_kurzbz
+					AND status_kurzbz = 'Student'
+					ORDER BY datum, insertamum, ext_id
+					LIMIT 1
+				) < ?
+				AND stg.melderelevant
+				AND prestudent.bismelden";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND prestudent.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
+
+	/**
+	 * Gets Bismeldedate from Studiensemester.
+	 * @param studiensemester_kurzbz string
+	 */
+	private function _getBisdateFromSemester($studiensemester_kurzbz)
+	{
+		$semesterYear = substr($studiensemester_kurzbz, 2, 6);
+		$semesterType = substr($studiensemester_kurzbz, 0, 2);
+
+		if ($semesterType == 'SS')
+		{
+			return date_format(date_create(($semesterYear - 1)."-11-15"), 'Y-m-d');
+		}
+
+		if ($semesterType == 'WS')
+		{
+			return date_format(date_create($semesterYear."-04-15"), 'Y-m-d');
+		}
+	}
 }
diff --git a/application/libraries/issues/plausichecks/NationNichtOesterreichAberGemeinde.php b/application/libraries/issues/plausichecks/NationNichtOesterreichAberGemeinde.php
index 53bd59826..c04cd664c 100644
--- a/application/libraries/issues/plausichecks/NationNichtOesterreichAberGemeinde.php
+++ b/application/libraries/issues/plausichecks/NationNichtOesterreichAberGemeinde.php
@@ -20,7 +20,7 @@ class NationNichtOesterreichAberGemeinde extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$personRes = $this->_ci->plausichecklib->getNationNichtOesterreichAberGemeinde(
+		$personRes = $this->getNationNichtOesterreichAberGemeinde(
 			$studiengang_kz,
 			null,
 			$exkludierte_studiengang_kz
@@ -46,4 +46,49 @@ class NationNichtOesterreichAberGemeinde extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Nation is not Austria, but address has austrian Gemeinde.
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param person_id int if check is to be executed only for one person
+	 * @return success with prestudents or error
+	 */
+	public function getNationNichtOesterreichAberGemeinde($studiengang_kz = null, $person_id = null, $exkludierte_studiengang_kz = null)
+	{
+		$params = array();
+
+		$qry = "SELECT DISTINCT tbl_person.person_id, adr.gemeinde, adr.adresse_id
+				FROM
+					public.tbl_adresse adr
+					JOIN public.tbl_prestudent USING(person_id)
+					JOIN public.tbl_person USING(person_id)
+					JOIN public.tbl_student USING(prestudent_id)
+					JOIN public.tbl_benutzer ON(uid=student_uid)
+					JOIN public.tbl_studiengang stg ON tbl_prestudent.studiengang_kz = stg.studiengang_kz
+				WHERE
+					adr.nation!='A'
+					AND tbl_benutzer.aktiv
+					AND gemeinde NOT IN ('Münster')
+					AND EXISTS(SELECT 1 FROM bis.tbl_gemeinde WHERE name = adr.gemeinde)";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($person_id))
+		{
+			$qry .= " AND tbl_person.person_id = ?";
+			$params[] = $person_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/OrgformStgUngleichOrgformPrestudent.php b/application/libraries/issues/plausichecks/OrgformStgUngleichOrgformPrestudent.php
index d9515a777..316e81072 100644
--- a/application/libraries/issues/plausichecks/OrgformStgUngleichOrgformPrestudent.php
+++ b/application/libraries/issues/plausichecks/OrgformStgUngleichOrgformPrestudent.php
@@ -21,7 +21,7 @@ class OrgformStgUngleichOrgformPrestudent extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getOrgformStgUngleichOrgformPrestudent(
+		$prestudentRes = $this->getOrgformStgUngleichOrgformPrestudent(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -57,4 +57,74 @@ class OrgformStgUngleichOrgformPrestudent extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Orgform of a Studiengang in Studienplan should be the same as orgform of student.
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getOrgformStgUngleichOrgformPrestudent(
+		$studiensemester_kurzbz,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array($studiensemester_kurzbz);
+
+		$qry = "
+			SELECT
+				prestudent.person_id, prestudent.prestudent_id, status.studiensemester_kurzbz,
+				studiengang.orgform_kurzbz AS stg_orgform, status.orgform_kurzbz AS student_orgform,
+				prestudent.studiengang_kz AS student_studiengang, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_studiengang studiengang
+				JOIN public.tbl_student student USING(studiengang_kz)
+				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_benutzer benutzer on(benutzer.uid = student.student_uid)
+				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
+				LEFT JOIN lehre.tbl_studienplan stpl USING (studienplan_id)
+			WHERE
+				benutzer.aktiv = true
+				AND status.status_kurzbz IN ('Student', 'Unterbrecher', 'Abbrecher', 'Diplomand', 'Absolvent')
+				AND studiengang.studiengang_kz < 10000
+				AND status.studiensemester_kurzbz = ?
+				AND NOT (status.orgform_kurzbz IS NULL AND studiengang.mischform = FALSE)
+				AND NOT EXISTS(
+					SELECT 1
+					FROM
+						lehre.tbl_studienplan
+					JOIN
+						lehre.tbl_studienordnung USING(studienordnung_id)
+					WHERE
+						tbl_studienplan.studienplan_id = stpl.studienplan_id
+						AND tbl_studienordnung.studiengang_kz = prestudent.studiengang_kz
+						AND tbl_studienplan.orgform_kurzbz = status.orgform_kurzbz)";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND studiengang.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND prestudent.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		$qry .= "
+			ORDER BY student_uid";
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/PlausiChecker.php b/application/libraries/issues/plausichecks/PlausiChecker.php
index 0d8da4007..086a44cc4 100644
--- a/application/libraries/issues/plausichecks/PlausiChecker.php
+++ b/application/libraries/issues/plausichecks/PlausiChecker.php
@@ -7,6 +7,7 @@ abstract class PlausiChecker
 {
 	protected $_ci; // code igniter instance
 	protected $_config; // configuration parameters for this plausicheck
+	protected $_db; // database for queries
 
 	public function __construct($configurationParams = null)
 	{
@@ -15,8 +16,8 @@ abstract class PlausiChecker
 		// set configuration
 		$this->_config = $configurationParams;
 
-		// load libraries
-		$this->_ci->load->library('issues/PlausicheckLib'); // load plausicheck library
+		// get database for queries
+		$this->_db = new DB_Model();
 	}
 
 	/**
diff --git a/application/libraries/issues/plausichecks/PrestudentMischformOhneOrgform.php b/application/libraries/issues/plausichecks/PrestudentMischformOhneOrgform.php
index e68d840d9..a4c3e2a4b 100644
--- a/application/libraries/issues/plausichecks/PrestudentMischformOhneOrgform.php
+++ b/application/libraries/issues/plausichecks/PrestudentMischformOhneOrgform.php
@@ -21,7 +21,7 @@ class PrestudentMischformOhneOrgform extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getPrestudentMischformOhneOrgform(
+		$prestudentRes = $this->getPrestudentMischformOhneOrgform(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -55,4 +55,55 @@ class PrestudentMischformOhneOrgform extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Students in "mixed" Studiengang should have Orgform.
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getPrestudentMischformOhneOrgform(
+		$studiensemester_kurzbz,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array($studiensemester_kurzbz);
+
+		$qry = "
+			SELECT
+				pre.person_id, pre.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz, status.studiensemester_kurzbz
+			FROM
+				public.tbl_prestudent pre
+				JOIN public.tbl_person USING(person_id)
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_studiengang stg USING(studiengang_kz)
+			WHERE
+				status.status_kurzbz IN ('Bewerber', 'Student')
+				AND stg.mischform
+				AND (status.orgform_kurzbz='' OR status.orgform_kurzbz IS NULL)
+				AND status.studiensemester_kurzbz=?";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND pre.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/StgPrestudentUngleichStgStudent.php b/application/libraries/issues/plausichecks/StgPrestudentUngleichStgStudent.php
index 61737cc4d..94bea2f35 100644
--- a/application/libraries/issues/plausichecks/StgPrestudentUngleichStgStudent.php
+++ b/application/libraries/issues/plausichecks/StgPrestudentUngleichStgStudent.php
@@ -20,7 +20,7 @@ class StgPrestudentUngleichStgStudent extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getStgPrestudentUngleichStgStudent($studiengang_kz, null, $exkludierte_studiengang_kz);
+		$prestudentRes = $this->getStgPrestudentUngleichStgStudent($studiengang_kz, null, $exkludierte_studiengang_kz);
 
 		if (isError($prestudentRes)) return $prestudentRes;
 
@@ -43,4 +43,48 @@ class StgPrestudentUngleichStgStudent extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Studiengang should be the same for prestudent and student.
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getStgPrestudentUngleichStgStudent($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
+	{
+		$params = array();
+
+		$qry = "
+			SELECT
+				pre.person_id, pre.prestudent_id, stg.oe_kurzbz prestudent_stg_oe_kurzbz, student_stg.oe_kurzbz student_stg_oe_kurzbz
+			FROM
+				public.tbl_prestudent pre
+				JOIN public.tbl_student stud USING(prestudent_id)
+				JOIN public.tbl_person pers USING(person_id)
+				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
+				JOIN public.tbl_studiengang student_stg ON stud.studiengang_kz = student_stg.studiengang_kz
+			WHERE
+				stud.studiengang_kz != pre.studiengang_kz";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND pre.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/StgPrestudentUngleichStgStudienplan.php b/application/libraries/issues/plausichecks/StgPrestudentUngleichStgStudienplan.php
index 0c9ce9300..fc0f52f23 100644
--- a/application/libraries/issues/plausichecks/StgPrestudentUngleichStgStudienplan.php
+++ b/application/libraries/issues/plausichecks/StgPrestudentUngleichStgStudienplan.php
@@ -20,7 +20,7 @@ class StgPrestudentUngleichStgStudienplan extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getStgPrestudentUngleichStgStudienplan($studiengang_kz, null, null, $exkludierte_studiengang_kz);
+		$prestudentRes = $this->getStgPrestudentUngleichStgStudienplan($studiengang_kz, null, null, $exkludierte_studiengang_kz);
 
 		if (isError($prestudentRes)) return $prestudentRes;
 
@@ -43,4 +43,62 @@ class StgPrestudentUngleichStgStudienplan extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Studiengang should be the same for prestudent and studienplan.
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param studienordnung_id int if check is to be executed only for a certain studienordnung_id
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getStgPrestudentUngleichStgStudienplan(
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$studienordnung_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array();
+
+		$qry = "
+			SELECT
+				DISTINCT ON (ps.prestudent_id) ps.person_id, ps.prestudent_id, stordnung.studienordnung_id,
+				stplan.bezeichnung AS studienplan, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_prestudent ps
+				JOIN public.tbl_prestudentstatus USING(prestudent_id)
+				JOIN lehre.tbl_studienplan stplan USING(studienplan_id)
+				JOIN lehre.tbl_studienordnung stordnung USING(studienordnung_id)
+				JOIN public.tbl_person USING(person_id)
+				JOIN public.tbl_studiengang stg ON ps.studiengang_kz = stg.studiengang_kz
+			WHERE
+				ps.studiengang_kz<>stordnung.studiengang_kz
+				AND stg.melderelevant";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND ps.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($studienordnung_id))
+		{
+			$qry .= " AND stordnung.studienordnung_id = ?";
+			$params[] = $studienordnung_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/StudentstatusNachAbbrecher.php b/application/libraries/issues/plausichecks/StudentstatusNachAbbrecher.php
index 47ca1fa2a..87bb51d7e 100644
--- a/application/libraries/issues/plausichecks/StudentstatusNachAbbrecher.php
+++ b/application/libraries/issues/plausichecks/StudentstatusNachAbbrecher.php
@@ -20,7 +20,7 @@ class StudentstatusNachAbbrecher extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getStudentstatusNachAbbrecher($studiengang_kz, null, $exkludierte_studiengang_kz);
+		$prestudentRes = $this->getStudentstatusNachAbbrecher($studiengang_kz, null, $exkludierte_studiengang_kz);
 
 		if (isError($prestudentRes)) return $prestudentRes;
 
@@ -43,4 +43,48 @@ class StudentstatusNachAbbrecher extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * There shouldn't be any status after Abbrecher status.
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getStudentstatusNachAbbrecher($studiengang_kz = null, $prestudent_id = null, $exkludierte_studiengang_kz = null)
+	{
+		$params = array();
+
+		$qry = "
+			SELECT
+				prestudent.person_id, prestudent.prestudent_id, stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_student student
+				JOIN public.tbl_prestudent prestudent USING(prestudent_id)
+				JOIN public.tbl_prestudentstatus prestatus USING(prestudent_id)
+				JOIN public.tbl_studiengang stg ON prestudent.studiengang_kz = stg.studiengang_kz
+			WHERE
+				prestatus.status_kurzbz = 'Abbrecher'
+				AND get_rolle_prestudent(prestudent.prestudent_id, prestatus.studiensemester_kurzbz) <> 'Abbrecher'";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND prestudent.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/plausichecks/StudienplanUngueltig.php b/application/libraries/issues/plausichecks/StudienplanUngueltig.php
index 22924abd8..9a306278e 100644
--- a/application/libraries/issues/plausichecks/StudienplanUngueltig.php
+++ b/application/libraries/issues/plausichecks/StudienplanUngueltig.php
@@ -21,7 +21,7 @@ class StudienplanUngueltig extends PlausiChecker
 		$studiengang_kz = isset($params['studiengang_kz']) ? $params['studiengang_kz'] : null;
 
 		// get all students failing the plausicheck
-		$prestudentRes = $this->_ci->plausichecklib->getStudienplanUngueltig(
+		$prestudentRes = $this->getStudienplanUngueltig(
 			$studiensemester_kurzbz,
 			$studiengang_kz,
 			null,
@@ -56,4 +56,71 @@ class StudienplanUngueltig extends PlausiChecker
 		// return the results
 		return success($results);
 	}
+
+	/**
+	 * Studienplan should be valid in current Ausbildungssemester of prestudent.
+	 * @param studiensemester_kurzbz string check is to be executed for certain Studiensemester
+	 * @param studiengang_kz int if check is to be executed for certain Studiengang
+	 * @param prestudent_id int if check is to be executed only for one prestudent
+	 * @param exkludierte_studiengang_kz array if certain Studiengänge have to be excluded from check
+	 * @return success with prestudents or error
+	 */
+	public function getStudienplanUngueltig(
+		$studiensemester_kurzbz,
+		$studiengang_kz = null,
+		$prestudent_id = null,
+		$exkludierte_studiengang_kz = null
+	) {
+		$params = array($studiensemester_kurzbz);
+
+		$qry = "
+			SELECT
+				DISTINCT pre.person_id, pre.prestudent_id,
+				tbl_studienplan.bezeichnung AS studienplan,
+				status.status_kurzbz,
+				status.studiensemester_kurzbz,
+				status.ausbildungssemester,
+				stg.oe_kurzbz AS prestudent_stg_oe_kurzbz
+			FROM
+				public.tbl_prestudent pre
+				JOIN public.tbl_prestudentstatus status USING(prestudent_id)
+				JOIN public.tbl_person USING(person_id)
+				JOIN lehre.tbl_studienplan USING(studienplan_id)
+				JOIN public.tbl_studiengang stg ON pre.studiengang_kz = stg.studiengang_kz
+			WHERE
+				status_kurzbz in('Student', 'Interessent','Bewerber','Aufgenommener')
+				AND NOT EXISTS (
+					SELECT
+						1
+					FROM
+						lehre.tbl_studienplan_semester
+					WHERE
+						studienplan_id=status.studienplan_id
+						AND tbl_studienplan_semester.semester = status.ausbildungssemester
+						AND tbl_studienplan_semester.studiensemester_kurzbz = status.studiensemester_kurzbz
+				)
+				AND status.studiensemester_kurzbz=?
+				AND pre.bismelden
+				AND stg.melderelevant";
+
+		if (isset($studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz = ?";
+			$params[] = $studiengang_kz;
+		}
+
+		if (isset($prestudent_id))
+		{
+			$qry .= " AND tbl_prestudent.prestudent_id = ?";
+			$params[] = $prestudent_id;
+		}
+
+		if (isset($exkludierte_studiengang_kz) && !isEmptyArray($exkludierte_studiengang_kz))
+		{
+			$qry .= " AND stg.studiengang_kz NOT IN ?";
+			$params[] = $exkludierte_studiengang_kz;
+		}
+
+		return $this->_db->execReadOnlyQuery($qry, $params);
+	}
 }
diff --git a/application/libraries/issues/resolvers/CORE_INOUT_0007.php b/application/libraries/issues/resolvers/CORE_INOUT_0007.php
index 2d9c7a3f4..31ca79ffb 100644
--- a/application/libraries/issues/resolvers/CORE_INOUT_0007.php
+++ b/application/libraries/issues/resolvers/CORE_INOUT_0007.php
@@ -17,10 +17,10 @@ class CORE_INOUT_0007 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/IncomingHeimatNationOesterreich');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getIncomingHeimatNationOesterreich($params['studiensemester_kurzbz'], null, $params['issue_person_id']);
+		$checkRes = $this->_ci->incomingheimatnationoesterreich->getIncomingHeimatNationOesterreich($params['studiensemester_kurzbz'], null, $params['issue_person_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_INOUT_0008.php b/application/libraries/issues/resolvers/CORE_INOUT_0008.php
index 30bbefdf1..4fa090c6a 100644
--- a/application/libraries/issues/resolvers/CORE_INOUT_0008.php
+++ b/application/libraries/issues/resolvers/CORE_INOUT_0008.php
@@ -14,10 +14,10 @@ class CORE_INOUT_0008 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/IncomingOhneIoDatensatz');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getIncomingOhneIoDatensatz(null, $params['prestudent_id']);
+		$checkRes = $this->_ci->incomingohneiodatensatz->getIncomingOhneIoDatensatz(null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_INOUT_0009.php b/application/libraries/issues/resolvers/CORE_INOUT_0009.php
index b56344042..c739d71c3 100644
--- a/application/libraries/issues/resolvers/CORE_INOUT_0009.php
+++ b/application/libraries/issues/resolvers/CORE_INOUT_0009.php
@@ -14,10 +14,10 @@ class CORE_INOUT_0009 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/IncomingOrGsFoerderrelevant');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getIncomingOrGsFoerderrelevant(null, null, $params['prestudent_id']);
+		$checkRes = $this->_ci->incomingorgsfoerderrelevant->getIncomingOrGsFoerderrelevant(null, null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_PERSON_0001.php b/application/libraries/issues/resolvers/CORE_PERSON_0001.php
index cf1560171..d0ac0d3ed 100644
--- a/application/libraries/issues/resolvers/CORE_PERSON_0001.php
+++ b/application/libraries/issues/resolvers/CORE_PERSON_0001.php
@@ -14,10 +14,10 @@ class CORE_PERSON_0001 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/GbDatumWeitZurueck');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getGbDatumWeitZurueck(null, null, $params['issue_person_id']);
+		$checkRes = $this->_ci->gbdatumweitzurueck->getGbDatumWeitZurueck(null, null, $params['issue_person_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_PERSON_0002.php b/application/libraries/issues/resolvers/CORE_PERSON_0002.php
index 969b2a5b0..608dcf0ce 100644
--- a/application/libraries/issues/resolvers/CORE_PERSON_0002.php
+++ b/application/libraries/issues/resolvers/CORE_PERSON_0002.php
@@ -14,10 +14,10 @@ class CORE_PERSON_0002 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/NationNichtOesterreichAberGemeinde');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getNationNichtOesterreichAberGemeinde(null, $params['issue_person_id']);
+		$checkRes = $this->_ci->nationnichtoesterreichabergemeinde->getNationNichtOesterreichAberGemeinde(null, $params['issue_person_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_PERSON_0003.php b/application/libraries/issues/resolvers/CORE_PERSON_0003.php
index 8f53d159c..23a81b660 100644
--- a/application/libraries/issues/resolvers/CORE_PERSON_0003.php
+++ b/application/libraries/issues/resolvers/CORE_PERSON_0003.php
@@ -14,10 +14,10 @@ class CORE_PERSON_0003 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/FalscheAnzahlHeimatadressen');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getFalscheAnzahlHeimatadressen(null, null, $params['issue_person_id']);
+		$checkRes = $this->_ci->falscheanzahlheimatadressen->getFalscheAnzahlHeimatadressen(null, null, $params['issue_person_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_PERSON_0004.php b/application/libraries/issues/resolvers/CORE_PERSON_0004.php
index 9ce9b7b8a..ae3a855ec 100644
--- a/application/libraries/issues/resolvers/CORE_PERSON_0004.php
+++ b/application/libraries/issues/resolvers/CORE_PERSON_0004.php
@@ -14,10 +14,10 @@ class CORE_PERSON_0004 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/FalscheAnzahlZustelladressen');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getFalscheAnzahlZustelladressen(null, null, $params['issue_person_id']);
+		$checkRes = $this->_ci->falscheanzahlzustelladressen->getFalscheAnzahlZustelladressen(null, null, $params['issue_person_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STG_0001.php b/application/libraries/issues/resolvers/CORE_STG_0001.php
index aee3fe0d2..09c34be74 100644
--- a/application/libraries/issues/resolvers/CORE_STG_0001.php
+++ b/application/libraries/issues/resolvers/CORE_STG_0001.php
@@ -14,10 +14,10 @@ class CORE_STG_0001 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/StgPrestudentUngleichStgStudent');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getStgPrestudentUngleichStgStudent(null, $params['prestudent_id']);
+		$checkRes = $this->_ci->stgprestudentungleichstgstudent->getStgPrestudentUngleichStgStudent(null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STG_0002.php b/application/libraries/issues/resolvers/CORE_STG_0002.php
index dd0e293d4..999958042 100644
--- a/application/libraries/issues/resolvers/CORE_STG_0002.php
+++ b/application/libraries/issues/resolvers/CORE_STG_0002.php
@@ -17,10 +17,10 @@ class CORE_STG_0002 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/OrgformStgUngleichOrgformPrestudent');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getOrgformStgUngleichOrgformPrestudent($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+		$checkRes = $this->_ci->orgformstgungleichorgformprestudent->getOrgformStgUngleichOrgformPrestudent($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STG_0003.php b/application/libraries/issues/resolvers/CORE_STG_0003.php
index 9559cdfb5..22d6399be 100644
--- a/application/libraries/issues/resolvers/CORE_STG_0003.php
+++ b/application/libraries/issues/resolvers/CORE_STG_0003.php
@@ -17,10 +17,10 @@ class CORE_STG_0003 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/PrestudentMischformOhneOrgform');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getPrestudentMischformOhneOrgform($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+		$checkRes = $this->_ci->prestudentmischformohneorgform->getPrestudentMischformOhneOrgform($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STG_0004.php b/application/libraries/issues/resolvers/CORE_STG_0004.php
index 6ecc80863..2eedfc7fe 100644
--- a/application/libraries/issues/resolvers/CORE_STG_0004.php
+++ b/application/libraries/issues/resolvers/CORE_STG_0004.php
@@ -17,10 +17,10 @@ class CORE_STG_0004 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/StgPrestudentUngleichStgStudienplan');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getStgPrestudentUngleichStgStudienplan(null, $params['prestudent_id'], $params['studienordnung_id']);
+		$checkRes = $this->_ci->stgprestudentungleichstgstudienplan->getStgPrestudentUngleichStgStudienplan(null, $params['prestudent_id'], $params['studienordnung_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0001.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0001.php
index 1f9dea34d..c74cd38fb 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0001.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0001.php
@@ -14,10 +14,10 @@ class CORE_STUDENTSTATUS_0001 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/AbbrecherAktiv');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getAbbrecherAktiv(null, $params['prestudent_id']);
+		$checkRes = $this->_ci->abbrecheraktiv->getAbbrecherAktiv(null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0002.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0002.php
index 95da215c1..36827684c 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0002.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0002.php
@@ -14,10 +14,10 @@ class CORE_STUDENTSTATUS_0002 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/StudentstatusNachAbbrecher');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getStudentstatusNachAbbrecher(null, $params['prestudent_id']);
+		$checkRes = $this->_ci->studentstatusnachabbrecher->getStudentstatusNachAbbrecher(null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0003.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0003.php
index 12e7a8da6..f3b150d8d 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0003.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0003.php
@@ -17,10 +17,14 @@ class CORE_STUDENTSTATUS_0003 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/AusbildungssemPrestudentUngleichAusbildungssemStatus');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getAusbildungssemPrestudentUngleichAusbildungssemStatus($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+		$checkRes = $this->_ci->ausbildungssemprestudentungleichausbildungssemstatus->getAusbildungssemPrestudentUngleichAusbildungssemStatus(
+			$params['studiensemester_kurzbz'],
+			null,
+			$params['prestudent_id']
+		);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0004.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0004.php
index 5cd8b7027..cbce2b01e 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0004.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0004.php
@@ -17,10 +17,14 @@ class CORE_STUDENTSTATUS_0004 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/InaktiverStudentAktiverStatus');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getInaktiverStudentAktiverStatus($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+		$checkRes = $this->_ci->inaktiverstudentaktiverstatus->getInaktiverStudentAktiverStatus(
+			$params['studiensemester_kurzbz'],
+			null,
+			$params['prestudent_id']
+		);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0005.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0005.php
index 420021289..f5e265194 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0005.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0005.php
@@ -17,10 +17,10 @@ class CORE_STUDENTSTATUS_0005 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/InskriptionVorLetzerBismeldung');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getInskriptionVorLetzerBismeldung($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+		$checkRes = $this->_ci->inskriptionvorletzerbismeldung->getInskriptionVorLetzerBismeldung($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0006.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0006.php
index 64e28ddc8..94658ec9c 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0006.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0006.php
@@ -14,10 +14,10 @@ class CORE_STUDENTSTATUS_0006 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/DatumStudiensemesterFalscheReihenfolge');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getDatumStudiensemesterFalscheReihenfolge(null, $params['prestudent_id']);
+		$checkRes = $this->_ci->datumstudiensemesterfalschereihenfolge->getDatumStudiensemesterFalscheReihenfolge(null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0007.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0007.php
index 68523b53b..3a2575e53 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0007.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0007.php
@@ -14,10 +14,10 @@ class CORE_STUDENTSTATUS_0007 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/AktiverStudentOhneStatus');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getAktiverStudentOhneStatus(null, $params['prestudent_id']);
+		$checkRes = $this->_ci->aktiverstudentohnestatus->getAktiverStudentOhneStatus(null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0008.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0008.php
index 940cb9b4c..53bfd72a6 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0008.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0008.php
@@ -17,10 +17,10 @@ class CORE_STUDENTSTATUS_0008 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/StudienplanUngueltig');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getStudienplanUngueltig($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+		$checkRes = $this->_ci->studienplanungueltig->getStudienplanUngueltig($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0009.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0009.php
index c55e4a9cc..816b7e933 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0009.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0009.php
@@ -14,10 +14,10 @@ class CORE_STUDENTSTATUS_0009 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/FalscheAnzahlAbschlusspruefungen');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getFalscheAnzahlAbschlusspruefungen(null, null, $params['prestudent_id']);
+		$checkRes = $this->_ci->falscheanzahlabschlusspruefungen->getFalscheAnzahlAbschlusspruefungen(null, null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0010.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0010.php
index 8da8e9c1d..b31fb872a 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0010.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0010.php
@@ -14,10 +14,10 @@ class CORE_STUDENTSTATUS_0010 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/DatumAbschlusspruefungFehlt');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getDatumAbschlusspruefungFehlt(null, null, $params['abschlusspruefung_id']);
+		$checkRes = $this->_ci->datumabschlusspruefungfehlt->getDatumAbschlusspruefungFehlt(null, null, $params['abschlusspruefung_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0011.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0011.php
index 6568d0b3e..9dff0181e 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0011.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0011.php
@@ -14,10 +14,10 @@ class CORE_STUDENTSTATUS_0011 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/DatumSponsionFehlt');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getDatumSponsionFehlt(null, null, $params['abschlusspruefung_id']);
+		$checkRes = $this->_ci->datumsponsionfehlt->getDatumSponsionFehlt(null, null, $params['abschlusspruefung_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0012.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0012.php
index d331ef6a2..7fe5dbde4 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0012.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0012.php
@@ -17,10 +17,14 @@ class CORE_STUDENTSTATUS_0012 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/BewerberNichtZumRtAngetreten');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getBewerberNichtZumRtAngetreten($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+		$checkRes = $this->_ci->bewerbernichtzumrtangetreten->getBewerberNichtZumRtAngetreten(
+			$params['studiensemester_kurzbz'],
+			null,
+			$params['prestudent_id']
+		);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0013.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0013.php
index e57b0aea0..86e8b75b1 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0013.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0013.php
@@ -17,10 +17,10 @@ class CORE_STUDENTSTATUS_0013 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/AktSemesterNull');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getAktSemesterNull($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
+		$checkRes = $this->_ci->aktsemesternull->getAktSemesterNull($params['studiensemester_kurzbz'], null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0014.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0014.php
index b58736f66..4b542cf0a 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0014.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0014.php
@@ -14,10 +14,10 @@ class CORE_STUDENTSTATUS_0014 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/AbschlussstatusFehlt');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getAbschlussstatusFehlt(null, null, $params['prestudent_id']);
+		$checkRes = $this->_ci->abschlussstatusfehlt->getAbschlussstatusFehlt(null, null, $params['prestudent_id']);
 
 		if (isError($checkRes)) return $checkRes;
 
diff --git a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0015.php b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0015.php
index aafee1124..37e42ec0a 100644
--- a/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0015.php
+++ b/application/libraries/issues/resolvers/CORE_STUDENTSTATUS_0015.php
@@ -17,10 +17,10 @@ class CORE_STUDENTSTATUS_0015 implements IIssueResolvedChecker
 
 		$this->_ci =& get_instance(); // get code igniter instance
 
-		$this->_ci->load->library('issues/PlausicheckLib');
+		$this->_ci->load->library('issues/plausichecks/AktiverStudentstatusOhneKontobuchung');
 
 		// check if issue persists
-		$checkRes = $this->_ci->plausichecklib->getAktiverStudentstatusOhneKontobuchung(
+		$checkRes = $this->_ci->aktiverstudentstatusohnekontobuchung->getAktiverStudentstatusOhneKontobuchung(
 			$params['studiensemester_kurzbz'],
 			null,
 			$params['prestudent_id']
diff --git a/application/views/system/issues/issuesKonfiguration.php b/application/views/system/issues/issuesKonfiguration.php
index 8b07157d2..dbd62a26a 100644
--- a/application/views/system/issues/issuesKonfiguration.php
+++ b/application/views/system/issues/issuesKonfiguration.php
@@ -82,6 +82,9 @@ $this->load->view(
 							<button class="btn btn-default" id="assignKonfiguration">
 								<?php echo $this->p->t('fehlermonitoring', 'konfigurationswertZuweisen') ?>
 							</button>
+							<button class="btn btn-default" id="deleteKonfiguration">
+								<?php echo $this->p->t('fehlermonitoring', 'konfigurationswertLoeschen') ?>
+							</button>
 						</div>
 					</div>
 				</div>
diff --git a/public/js/issues/issuesKonfiguration.js b/public/js/issues/issuesKonfiguration.js
index 9e0ebaf4d..f2e7aa5c3 100644
--- a/public/js/issues/issuesKonfiguration.js
+++ b/public/js/issues/issuesKonfiguration.js
@@ -144,6 +144,34 @@ var IssuesKonfiguration = {
 			}
 		);
 	},
+	deleteKonfigurationsWerte: function(konfigurationstyp_kurzbz, fehlercode, konfigurationsWert)
+	{
+		FHC_AjaxClient.ajaxCallPost(
+			'system/issues/IssuesKonfiguration/deleteKonfigurationsWerte',
+			{
+				konfigurationstyp_kurzbz: konfigurationstyp_kurzbz,
+				fehlercode: fehlercode,
+				konfigurationsWert: konfigurationsWert
+			},
+			{
+				successCallback: function(data, textStatus, jqXHR) {
+					if (FHC_AjaxClient.hasData(data))
+					{
+						FHC_DialogLib.alertSuccess(FHC_PhrasesLib.t('fehlermonitoring', 'konfigurationGeloescht'))
+						// reload dataset to see change
+						IssuesKonfiguration._reloadKonfigurationOverview();
+					}
+					else
+					{
+						FHC_DialogLib.alertError(FHC_PhrasesLib.t('fehlermonitoring', 'konfigurationGeloeschtFehler'));
+					}
+				},
+				errorCallback: function(jqXHR, textStatus, errorThrown) {
+					FHC_DialogLib.alertError(textStatus);
+				}
+			}
+		);
+	},
 	deleteKonfiguration: function(konfigurationstyp_kurzbz, fehlercode)
 	{
 		FHC_AjaxClient.ajaxCallPost(
@@ -229,7 +257,7 @@ $(document).ready(function() {
 		}
 	);
 
-	// get new fehlercodes each time app is changed
+	// set assign configuration event
 	$("#assignKonfiguration").click(
 		function()
 		{
@@ -241,6 +269,18 @@ $(document).ready(function() {
 		}
 	);
 
+	// set delete configuration event
+	$("#deleteKonfiguration").click(
+		function()
+		{
+			IssuesKonfiguration.deleteKonfigurationsWerte(
+				$("#"+FEHLERKONFIGURATIONSTYP_DROPDOWN_ID).val(),
+				$("#"+FEHLERCODE_DROPDOWN_ID).val(),
+				$("#konfigurationsWert").val()
+			);
+		}
+	);
+
 	// set events for showing info modals
 	$("#fehlercodeInfoIcon").click(
 		function()
diff --git a/system/phrasesupdate.php b/system/phrasesupdate.php
index 0bc748c80..28735e07f 100644
--- a/system/phrasesupdate.php
+++ b/system/phrasesupdate.php
@@ -17897,7 +17897,7 @@ array(
 			),
 			array(
 				'sprache' => 'English',
-				'text' => 'Invalid configuration value for data type {1}, special characters not allowed',
+				'text' => 'Invalid configuration value for data type {0}, special characters not allowed',
 				'description' => '',
 				'insertvon' => 'system'
 			)
@@ -18123,6 +18123,26 @@ array(
 			)
 		)
 	),
+	array(
+		'app' => 'core',
+		'category' => 'fehlermonitoring',
+		'phrase' => 'konfigurationswertLoeschen',
+		'insertvon' => 'system',
+		'phrases' => array(
+			array(
+				'sprache' => 'German',
+				'text' => 'Konfigurationswert(e) löschen',
+				'description' => '',
+				'insertvon' => 'system'
+			),
+			array(
+				'sprache' => 'English',
+				'text' => 'Delete configuration value(s)',
+				'description' => '',
+				'insertvon' => 'system'
+			)
+		)
+	),
 );