Index: library/serialize/serializer.tcl
===================================================================
diff -u -N -rccb2c99f6fb6f381dfc7e300584ac08e3d2809d3 -r24c01cb4dd0c1d32c693f6314b45ea979eeedf06
--- library/serialize/serializer.tcl	(.../serializer.tcl)	(revision ccb2c99f6fb6f381dfc7e300584ac08e3d2809d3)
+++ library/serialize/serializer.tcl	(.../serializer.tcl)	(revision 24c01cb4dd0c1d32c693f6314b45ea979eeedf06)
@@ -665,7 +665,7 @@
             $s addPostCmd [list $o trace add variable $v $op $cmd]
 
             # remove trace from object
-            $o trace remove variable $v $op $cmd
+	    ::nsf::directdispatch $o -frame object ::trace remove variable $v $op $cmd
           }
         }
       }