Index: openacs-4/packages/categories/www/cadmin/category-form.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/categories/www/cadmin/category-form.tcl,v
diff -u -N -r1.15 -r1.16
--- openacs-4/packages/categories/www/cadmin/category-form.tcl	12 Feb 2019 17:12:19 -0000	1.15
+++ openacs-4/packages/categories/www/cadmin/category-form.tcl	29 Nov 2019 14:28:48 -0000	1.16
@@ -26,8 +26,8 @@
 }
 
 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 $page_title
 
 set languages [lang::system::get_locale_options]