Index: TODO
===================================================================
diff -u -rb3018d3be0f1524a3f1709edc0e2ddb5d8bc4c0b -r5b2eafb18ce22d7aa8cef352f535da5046cac7d9
--- TODO	(.../TODO)	(revision b3018d3be0f1524a3f1709edc0e2ddb5d8bc4c0b)
+++ TODO	(.../TODO)	(revision 5b2eafb18ce22d7aa8cef352f535da5046cac7d9)
@@ -2537,8 +2537,8 @@
   class should be straightforward.
 
 * various documentation updates (migration guide, nx tutorial)
+* fixed bad interaction between filter and parameter alias
 
-
 TODO:
 - maybe the destructor of a slot should remove the setter/forwarder
 - how to delete attributes
Index: generic/nsf.c
===================================================================
diff -u -rb3018d3be0f1524a3f1709edc0e2ddb5d8bc4c0b -r5b2eafb18ce22d7aa8cef352f535da5046cac7d9
--- generic/nsf.c	(.../nsf.c)	(revision b3018d3be0f1524a3f1709edc0e2ddb5d8bc4c0b)
+++ generic/nsf.c	(.../nsf.c)	(revision 5b2eafb18ce22d7aa8cef352f535da5046cac7d9)
@@ -10230,17 +10230,23 @@
    * If we are already in the precedence ordering, then advance
    * past our last point; otherwise (if clPtr==NULL) begin from the start.
    *
-   * When a mixin or filter chain reached its end, we have to search
-   * the obj-specific methods as well.
+   * When a mixin or filter chain reached its end, we have to check for
+   * absolute method names and search the obj-specific methods as well.
    */
-
-  if (object->nsPtr && endOfChain) {
-    *cmdPtr = FindMethod(object->nsPtr, *methodNamePtr);
+  if (endOfChain) {
+    if (**methodNamePtr == ':') {
+      *cmdPtr = Tcl_FindCommand(interp, *methodNamePtr, NULL, TCL_GLOBAL_ONLY);
+      /* fprintf(stderr, "NEXT found abolute cmd %s => %p\n", *methodNamePtr, *cmdPtr); */
+    } else if (object->nsPtr) {
+      *cmdPtr = FindMethod(object->nsPtr, *methodNamePtr);
+    } else {
+      *cmdPtr = NULL;
+    }
   } else {
     *cmdPtr = NULL;
   }
 
-  /* printf(stderr, "NEXT methodName %s *clPtr %p %s *cmd %p\n",
+  /*fprintf(stderr, "NEXT methodName %s *clPtr %p %s *cmd %p\n",
    *methodNamePtr, *clPtr, ClassName((*clPtr)), *cmdPtr);*/
 
   if (!*cmdPtr) {
Index: library/nx/nx.tcl
===================================================================
diff -u -rb3018d3be0f1524a3f1709edc0e2ddb5d8bc4c0b -r5b2eafb18ce22d7aa8cef352f535da5046cac7d9
--- library/nx/nx.tcl	(.../nx.tcl)	(revision b3018d3be0f1524a3f1709edc0e2ddb5d8bc4c0b)
+++ library/nx/nx.tcl	(.../nx.tcl)	(revision 5b2eafb18ce22d7aa8cef352f535da5046cac7d9)
@@ -1081,9 +1081,9 @@
     # create "superclass" as a ObjectParameterSlot
     #
     #::nx::RelationSlot create ${os}::Class::slot::superclass -default ${os}::Object
-    #::nx::ObjectParameterSlot create ${os}::Class::slot::superclass \
-	-methodname "::nsf::methods::class::superclass" -default ${os}::Object
     ::nx::ObjectParameterSlot create ${os}::Class::slot::superclass \
+	-methodname "::nsf::methods::class::superclass" -default ${os}::Object
+    #::nx::ObjectParameterSlot create ${os}::Class::slot::superclass \
 	-methodname "::nsf::relation %self superclass" -disposition forward -default ${os}::Object
 
 
Index: tests/parameters.test
===================================================================
diff -u -r3b7a544e17d23c11227445e2949b94b953fc312c -r5b2eafb18ce22d7aa8cef352f535da5046cac7d9
--- tests/parameters.test	(.../parameters.test)	(revision 3b7a544e17d23c11227445e2949b94b953fc312c)
+++ tests/parameters.test	(.../parameters.test)	(revision 5b2eafb18ce22d7aa8cef352f535da5046cac7d9)
@@ -249,7 +249,7 @@
   C create c1
  
   ? {C eval {:objectparameter}} \
-      "{{-superclass:forward,arg=::nsf::relation %self superclass} ::nx::Object} -object-mixin:alias,arg=::nsf::classes::nx::Object::mixin -mixin:alias -object-filter:alias,arg=::nsf::classes::nx::Object::filter -filter:alias -attributes:alias -volatile:alias,noarg -noinit:alias,arg=::nsf::methods::object::noinit,noarg -class:alias,arg=::nsf::methods::object::class __initcmd:initcmd,optional"
+      "{-superclass:alias,arg=::nsf::methods::class::superclass ::nx::Object} -object-mixin:alias,arg=::nsf::classes::nx::Object::mixin -mixin:alias -object-filter:alias,arg=::nsf::classes::nx::Object::filter -filter:alias -attributes:alias -volatile:alias,noarg -noinit:alias,arg=::nsf::methods::object::noinit,noarg -class:alias,arg=::nsf::methods::object::class __initcmd:initcmd,optional"
 
   ? {c1 eval {:objectparameter}} \
       "-a -b:boolean {-c 1} -volatile:alias,noarg -noinit:alias,arg=::nsf::methods::object::noinit,noarg -mixin:alias -class:alias,arg=::nsf::methods::object::class -filter:alias __initcmd:initcmd,optional"