diff --git a/rdf/student.rdf.php b/rdf/student.rdf.php
index 47cc44167..82b878ea0 100755
--- a/rdf/student.rdf.php
+++ b/rdf/student.rdf.php
@@ -806,7 +806,7 @@ else
 				}
 			}
 
-			if($studienplan_id!='')
+			if(isset($studienplan_id) && $studienplan_id!='')
 			{
 				$stpl = new studienplan();
 				$stpl->loadStudienplan($studienplan_id);
diff --git a/vilesci/bis/studentenmeldung.php b/vilesci/bis/studentenmeldung.php
index 631ba2ab5..bc2ea4d24 100644
--- a/vilesci/bis/studentenmeldung.php
+++ b/vilesci/bis/studentenmeldung.php
@@ -908,7 +908,6 @@ function GenerateXMLStudentBlock($row)
 				$studstatuscode = $kodex_studstatuscode_array[$rowgs->status_kurzbz];
 				$gsblock.="
 				<GS>
-					<PersKz>".$row->matrikelnr."</PersKz>
 					<MobilitaetsProgrammCode>".$rowgs->mobilitaetsprogramm_code."</MobilitaetsProgrammCode>
 					<ProgrammNr>".$rowgs->programm_code."</ProgrammNr>
 					<StudTyp>".$studtyp."</StudTyp>