diff --git a/src/de/dhbwstuttgart/syntaxtree/type/RefType.java b/src/de/dhbwstuttgart/syntaxtree/type/RefType.java
index aaef7adad..a25994b4f 100755
--- a/src/de/dhbwstuttgart/syntaxtree/type/RefType.java
+++ b/src/de/dhbwstuttgart/syntaxtree/type/RefType.java
@@ -111,7 +111,7 @@ public class RefType extends Type implements IMatchable
         super(offset);
         // otth: Copy-Konstruktor
         this.setName(R.getTypeName());
-        this.set_ParaList(R.get_ParaList());
+        this.set_ParaList(R.getParaList());
     }
     // ino.end
 
@@ -332,14 +332,22 @@ public class RefType extends Type implements IMatchable
     }
     // ino.end
 
+    /**
+     * @return gibt bei leere Parameterliste null zurück. Ist entscheidend für unify-Algorithmus
+     */
     // ino.method.get_ParaList.26664.definition 
     public Vector<Type> get_ParaList()
     // ino.end
     // ino.method.get_ParaList.26664.body 
     {
-    return this.parameter;
+    	if(this.parameter == null || this.parameter.size()==0)return null;
+    	return this.parameter;
     }
     // ino.end
+    
+    public Vector<Type> getParaList(){
+    	return this.parameter;
+    }
 
     // ino.method.add_Parameter.26667.definition 
     public void add_Parameter(Type o)
@@ -737,9 +745,9 @@ public class RefType extends Type implements IMatchable
 	@Override
 	public JavaCodeResult printJavaCode(ResultSet resultSet) {
 		JavaCodeResult ret = new JavaCodeResult(this.name.toString());
-		if(this.get_ParaList()!=null && this.get_ParaList().size()>0){
+		if(this.getParaList()!=null && this.getParaList().size()>0){
 			ret .attach( "<" );
-			Iterator<Type> it = this.get_ParaList().iterator();
+			Iterator<Type> it = this.getParaList().iterator();
 			while(it.hasNext()){
 				Type t = it.next();
 				ret .attach( t.printJavaCode(resultSet));
diff --git a/src/de/dhbwstuttgart/typeinference/assumptions/TypeAssumptions.java b/src/de/dhbwstuttgart/typeinference/assumptions/TypeAssumptions.java
index ae128ffd2..befd80002 100755
--- a/src/de/dhbwstuttgart/typeinference/assumptions/TypeAssumptions.java
+++ b/src/de/dhbwstuttgart/typeinference/assumptions/TypeAssumptions.java
@@ -301,7 +301,7 @@ public class TypeAssumptions {
 			if(match && t instanceof RefType){
 				RefType tr = (RefType)t;
 				RefType ret = ass.getAssumedClass().getType(); //Dadurch erhält der RefType den vollen Namen (bsp. java.lang.Integer)
-				ret.set_ParaList(tr.get_ParaList());
+				ret.set_ParaList(tr.getParaList());
 				return new ConstraintType(ret);
 			}
 		}
diff --git a/src/de/dhbwstuttgart/typeinference/unify/Unify.java b/src/de/dhbwstuttgart/typeinference/unify/Unify.java
index 6bae8d6ab..3317cbeac 100755
--- a/src/de/dhbwstuttgart/typeinference/unify/Unify.java
+++ b/src/de/dhbwstuttgart/typeinference/unify/Unify.java
@@ -7,9 +7,7 @@ import java.util.Enumeration;
 import java.util.Hashtable;
 import java.util.Iterator;
 import java.util.Vector;
-
 import org.apache.log4j.Logger;
-
 import de.dhbwstuttgart.core.MyCompiler;
 import de.dhbwstuttgart.myexception.CTypeReconstructionException;
 import de.dhbwstuttgart.myexception.MatchException;