diff --git a/su4sml/src/wfcpog/library.sml b/su4sml/src/wfcpog/library.sml
index 1be830d..41be491 100644
--- a/su4sml/src/wfcpog/library.sml
+++ b/su4sml/src/wfcpog/library.sml
@@ -65,8 +65,10 @@ sig
     val disjugate_terms           : Rep_OclTerm.OclTerm list -> Rep_OclTerm.OclTerm
     (** Get an attribute by name. *)
     val get_attribute             : string -> Rep_Core.Classifier -> Rep.Model -> Rep_Core.attribute
+    (** Get an associationend by name.*)
+    val get_associationend        : string -> Rep_Core.Classifier -> Rep.Model -> Rep_Core.associationend
     (** Get an operation by name. *)
- (*    val get_operation             : string -> Rep_Core.Classifier -> Rep.Model -> Rep_Core.operation *)
+    (*    val get_operation             : string -> Rep_Core.Classifier -> Rep.Model -> Rep_Core.operation *)
     (** *) 
     val class_contains_op         : Rep_Core.operation -> Rep.Model -> Rep_Core.Classifier -> bool
     (** *)
@@ -220,10 +222,29 @@ fun get_attribute s classifier model =
 	val x = List.find (fn a => if ((#name a) = s) then true else false) (all_attributes_of classifier model)
     in
 	case x of
-	    NONE => raise WFCPOG_LibraryError ("No attribute found using 'get_attribute'.\n")
+	    NONE => 
+	    let
+		val _ = trace exce ("No such Attribute: \n In Classifier "^(string_of_path (name_of classifier))^" in attribute "^s)
+	    in
+		raise WFCPOG_LibraryError ("No attribute found using 'get_attribute'.\n")
+	    end
 	  | SOME (x) => x
     end
 
+fun get_associationend s classifier model = 
+    let
+	val x = List.find (fn a => if ((List.last(#name a)) = s) then true else false) (all_associationends_of classifier model)
+    in
+	case x of 
+	    NONE =>
+	    let
+		val _ = trace exce ("No such associationend: \n In Classifier "^(string_of_path (Rep_Core.name_of classifier))^" no associationend called "^(s)^".\n")
+	    in
+		raise WFCPOG_LibraryError ("No attribute found using 'get_attribute'.\n")
+	    end 
+	  | SOME(x) => x
+    end
+
 
 fun go_up_hierarchy location func (model as (clist,alist)) = 
     let 
diff --git a/su4sml/src/wfcpog/status.txt b/su4sml/src/wfcpog/status.txt
index 395d434..abeb190 100644
--- a/su4sml/src/wfcpog/status.txt
+++ b/su4sml/src/wfcpog/status.txt
@@ -1,8 +1,7 @@
 
 
-"visibilityconsistency.sml"          ===> [DONE (class: support for
-assocends)]  ==> MANUEL
-"liskovconstraint.sml"               ===> [DONE (invariants)]
+"visibilityconsistency.sml"          ===> [DONE]
+"liskovconstraint.sml"               ===> [DONE]
 "datamodelconsistency.sml"           ===> [DONE]
 "constructorconsistency.sml"         ===> [DONE
 (force_initialize_attributes still left]
diff --git a/su4sml/src/wfcpog/test-data.sml b/su4sml/src/wfcpog/test-data.sml
index ad3c888..3a37c30 100644
--- a/su4sml/src/wfcpog/test-data.sml
+++ b/su4sml/src/wfcpog/test-data.sml
@@ -96,6 +96,6 @@ val pos =
 [po_lsk_pre,po_lsk_post,po_lsk_inv,po_cm,po_sm,po_om,po_cstr_post,po_cstr_attribute,po_cstr_all]
 
 (*
-val wfcs = [wfc_vis_class]
+val wfcs = [wfc_vis_runtime]
 val pos = [po_lsk_inv]
 *)
diff --git a/su4sml/src/wfcpog/test-suite.sml b/su4sml/src/wfcpog/test-suite.sml
index 26c6d3a..2f8bd76 100644
--- a/su4sml/src/wfcpog/test-suite.sml
+++ b/su4sml/src/wfcpog/test-suite.sml
@@ -204,8 +204,8 @@ fun test (tc:testcase) wfs pos =
     let 
 	val i_model = ModelImport.import (#uml tc) (#ocl tc) []
 	val (clist,alist) = Rep_Core.normalize_ext i_model
-(* 	val model = (((#1 i_model)@oclLib),(#2 i_model)) *)
-	val model = ((clist@oclLib),alist)
+ 	val model = (((#1 i_model)@oclLib),(#2 i_model))
+(* 	val model = ((clist@oclLib),alist) *)
 	val _ = trace wgen ("Model of testcase loaded ...\n")
 	val x = start_tests model (wfs@pos)
 	val _ = trace wgen ("Test finished ...\n")
diff --git a/su4sml/src/wfcpog/visibility_consistency.sml b/su4sml/src/wfcpog/visibility_consistency.sml
index f11862b..c93484e 100644
--- a/su4sml/src/wfcpog/visibility_consistency.sml
+++ b/su4sml/src/wfcpog/visibility_consistency.sml
@@ -122,8 +122,8 @@ and expr_is_visible modif (Literal(s,typ)) model = true
 	val _ = trace wgen ("start expr_is_visible")
 	val cl = class_of_term src model
 	val att_name = List.last(path)
-	val _ = trace wgen ("start get_attribute ")
-	val att = get_attribute att_name cl model
+	val _ = trace wgen ("start get_associationends ")
+	val att = get_associationend att_name cl model
 	val _ = trace wgen ("end expr_is_visible")
     in
 	if (visibility_conforms_to (#visibility att) modif)
@@ -173,9 +173,7 @@ fun check_entity_classifier class model =
     let
 	val vis_ops = List.map (fn (a:operation) => ((#visibility a),SOME(a),NONE,NONE)) (all_operations_of class model)
 	val vis_atts = List.map (fn (a:attribute) => ((#visibility a),NONE,SOME(a),NONE)) (all_attributes_of class model)
-(*        val vis_assocs = List.map (fn (a:associationend) => ((#visibility a),NONE,NONE,SOME(a))) (all_associationends_of class model)
-			 handle Bind => raise WFCPOG.WFCPOG_Exception ("Bind exception\n")
-*)
+ 	val vis_assocs = List.map (fn (a:associationend) => ((#visibility a),NONE,NONE,SOME(a))) (all_associationends_of class model)
 	val vis_class = visibility_of class
 	val check = 
 	    List.map (fn ((a:Visibility),x,y,z) => 
@@ -198,7 +196,7 @@ fun check_entity_classifier class model =
 			     in
 				 raise WFCPOG.WFC_FailedMessage (s1^s2^s3^s4^s5^s6)
 			     end
-		     ) ((vis_ops)@(vis_atts))
+		     ) ((vis_ops)@(vis_atts)@(vis_assocs))
     in
 	List.all (fn a => a = true) check
     end