diff --git a/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java b/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
index d2976562..af90b7bd 100644
--- a/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
+++ b/src/de/dhbwstuttgart/syntaxtree/factory/UnifyTypeFactory.java
@@ -191,7 +191,11 @@ public class UnifyTypeFactory {
 	}
 	
 	public static Type convert(PlaceholderType t) {
-		return TypePlaceholder.getInstance(t.getName());
+		TypePlaceholder ret = TypePlaceholder.getInstance(t.getName());
+		if(ret == null){ //Dieser TPH wurde vom Unifikationsalgorithmus erstellt
+			ret = TypePlaceholder.fresh(t.getName(), NULL_NODE);
+		}
+		return ret;
 	}
 	
 	public static Type convert(UnifyType t) {
@@ -206,7 +210,8 @@ public class UnifyTypeFactory {
 	private static List<Type> convert(TypeParams typeParams) {
 		List<Type> ret = new ArrayList<>();
 		for(UnifyType uT : typeParams){
-			ret.add(convert(uT));
+			Type toAdd = convert(uT);
+			ret.add(toAdd);
 		}
 		return ret;
 	}
diff --git a/src/de/dhbwstuttgart/syntaxtree/type/RefType.java b/src/de/dhbwstuttgart/syntaxtree/type/RefType.java
index 1fa47df1..20e8fe25 100755
--- a/src/de/dhbwstuttgart/syntaxtree/type/RefType.java
+++ b/src/de/dhbwstuttgart/syntaxtree/type/RefType.java
@@ -256,8 +256,6 @@ public class RefType extends ObjectType implements IMatchable
     		else paralist.add(t);
     	}*/
     	this.parameter = v;//paralist;
-    	//parserlog.debug("T->Type.java->set_ParaList->parameter: " + parameter);
-    	//parserlog.debug("T->Type.java->get_Type: " + getName());
     }
     // ino.end