@@ -116,7 +116,7 @@
 					// Create targetProperty
 					Property targetProperty = UMLFactory.eINSTANCE.createProperty();
 					targetProperty.setType(sourceType);
-					targetProperty.setName(sourceType.getName().toLowerCase()); // all elements in UML must have a qualified name
+					targetProperty.setName(sourceType.getName() != null ? sourceType.getName().toLowerCase() : "null");
 
 					Association association = UMLFactory.eINSTANCE.createAssociation();
 					association.getMemberEnds().add(sourcePart);