diff --git a/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java b/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
index 803e0df1..ef84fad9 100644
--- a/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
+++ b/src/main/java/de/dhbwstuttgart/typeinference/typeAlgo/TYPEStmt.java
@@ -207,9 +207,10 @@ public class TYPEStmt implements StatementVisitor{
         Set<Constraint<Pair>> methodConstraints = new HashSet<>();
         for(MethodAssumption m : this.getMethods(methodCall.name, methodCall.arglist, info)){
             GenericsResolver resolver = getResolverInstance();
-            Constraint<Pair> oneMethodConstraint = generateConstraint(methodCall, m, info, resolver);
-            methodConstraints.add(oneMethodConstraint);
+            Set<Constraint<Pair>> oneMethodConstraints = generateConstraint(methodCall, m, info, resolver);
+            methodConstraints.addAll(oneMethodConstraints);
             
+            /* pl 2023-01-20: in generateConstraint bereits umgesetzt
             Constraint<Pair> extendsOneMethodConstraint = oneMethodConstraint.stream()
             		.map(x -> (x.TA1 instanceof TypePlaceholder && 
             				   x.GetOperator() == PairOperator.EQUALSDOT &&
@@ -220,6 +221,7 @@ public class TYPEStmt implements StatementVisitor{
             oneMethodConstraint.setExtendConstraint(extendsOneMethodConstraint);
             extendsOneMethodConstraint.setExtendConstraint(oneMethodConstraint);
             methodConstraints.add(extendsOneMethodConstraint);
+            */
         }
         if(methodConstraints.size()<1){
             throw new TypeinferenceException("Methode "+methodCall.name+" ist nicht vorhanden!",methodCall.getOffset());
@@ -616,9 +618,12 @@ public class TYPEStmt implements StatementVisitor{
     METHOD CALL Section:
      */
 
-    protected Constraint<Pair> generateConstraint(MethodCall forMethod, MethodAssumption assumption,
+    protected Set<Constraint<Pair>> generateConstraint(MethodCall forMethod, MethodAssumption assumption,
                                                   TypeInferenceBlockInformation info, GenericsResolver resolver){
-        Constraint<Pair> methodConstraint = new Constraint<>(assumption.isInherited());
+        Constraint<Pair> methodConstraint, extendsMethodConstraint;
+        methodConstraint = new Constraint<>(assumption.isInherited());
+        extendsMethodConstraint = new Constraint<>(assumption.isInherited());// PL 2023-01-24: Ersetzt die Dopplung in visit(MethodCall)
+        
         ClassOrInterface receiverCl = assumption.getReceiver();
         /*
         List<RefTypeOrTPHOrWildcardOrGeneric> params = new ArrayList<>();
@@ -630,20 +635,30 @@ public class TYPEStmt implements StatementVisitor{
         RefTypeOrTPHOrWildcardOrGeneric receiverType = new RefType(assumption.getReceiver().getClassName(), params, forMethod.getOffset());
         */
         
-        RefTypeOrTPHOrWildcardOrGeneric retType = assumption.getReceiverType(resolver);
-        methodConstraint.add(new Pair(forMethod.receiver.getType(), retType,
-        		             PairOperator.EQUALSDOT));//PL 2020-03-17 SMALLERDOT in EQUALSDOT umgewandelt, weil alle geerbten Methoden in den jeweilen Klassen enthalten sind. 
-        		       
+        RefTypeOrTPHOrWildcardOrGeneric receiverType = assumption.getReceiverType(resolver);
+        methodConstraint.add(new Pair(forMethod.receiver.getType(), receiverType, PairOperator.EQUALSDOT));//PL 2020-03-17 SMALLERDOT in EQUALSDOT umgewandelt, weil alle geerbten Methoden in den jeweilen Klassen enthalten sind. 
+        	
+        //PL 2023-01-24: dafuer ? extends receiverType noch ergaenzt 
+        extendsMethodConstraint.add(new Pair(forMethod.receiver.getType(), new ExtendsWildcardType(receiverType, receiverType.getOffset()), PairOperator.EQUALSDOT));
+        
         //Fuer Bytecodegenerierung PL 2020-03-09 wird derzeit nicht benutzt ANFANG
         //methodConstraint.add(new Pair(forMethod.receiverType, retType,
         //        PairOperator.EQUALSDOT));
         //Fuer Bytecodegenerierung PL 2020-03-09 wird derzeit nicht benutzt ENDE
         
       
-        methodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(),
-        			PairOperator.EQUALSDOT));
-        methodConstraint.addAll(generateParameterConstraints(forMethod, assumption, info, resolver));
-        return methodConstraint;
+        methodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.EQUALSDOT));
+        extendsMethodConstraint.add(new Pair(assumption.getReturnType(resolver), forMethod.getType(), PairOperator.EQUALSDOT));
+        
+        Set<Pair> parameterContraints = generateParameterConstraints(forMethod, assumption, info, resolver);
+        
+        methodConstraint.addAll(parameterContraints);
+        extendsMethodConstraint.addAll(parameterContraints);
+        
+        Set<Constraint<Pair>> ret = new HashSet<>();
+        ret.add(methodConstraint);
+        ret.add(extendsMethodConstraint);
+        return ret;
     }
 
     protected Set<Pair> generateParameterConstraints(MethodCall foMethod, MethodAssumption assumption,