Index: openacs-4/packages/categories/www/cadmin/synonym-form.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/categories/www/cadmin/synonym-form.tcl,v
diff -u -N -r1.8 -r1.9
--- openacs-4/packages/categories/www/cadmin/synonym-form.tcl	29 Jun 2018 17:27:18 -0000	1.8
+++ openacs-4/packages/categories/www/cadmin/synonym-form.tcl	29 Nov 2019 14:28:48 -0000	1.9
@@ -30,8 +30,8 @@
 set page_title "$action category synonym of \"$tree_name :: $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 [list [export_vars -no_empty -base synonyms-view { category_id tree_id locale object_id ctx_id}] "Synonyms of $category_name"] "$action synonym"