Index: openacs-4/packages/categories/www/cadmin/category-parent-change.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/categories/www/cadmin/category-parent-change.tcl,v
diff -u -r1.8.2.1 -r1.8.2.2
--- openacs-4/packages/categories/www/cadmin/category-parent-change.tcl	29 Nov 2019 14:04:08 -0000	1.8.2.1
+++ openacs-4/packages/categories/www/cadmin/category-parent-change.tcl	29 Nov 2019 14:32:04 -0000	1.8.2.2
@@ -23,8 +23,8 @@
 set category_name [category::get_name $category_id $locale]
 set page_title "Change parent category of \"$category_name\""
 set context_bar [category::context_bar $tree_id $locale \
-                     [value_if_exists object_id] \
-                     [value_if_exists ctx_id]]
+                     [expr {[info exists object_id] ? $object_id : ""}] \
+                     [expr {[info exists ctx_id] ? $ctx_id : ""}]]
 lappend context_bar "Change parent"