Index: openacs-4/packages/workflow/tcl/case-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/workflow/tcl/case-procs.tcl,v
diff -u -r1.54 -r1.55
--- openacs-4/packages/workflow/tcl/case-procs.tcl	22 Mar 2019 22:28:00 -0000	1.54
+++ openacs-4/packages/workflow/tcl/case-procs.tcl	20 Nov 2019 14:06:41 -0000	1.55
@@ -2229,7 +2229,7 @@
                 -action_id $action_id \
                 -parent_enabled_action_id $parent_enabled_action_id \
                 -user_id $user_id \
-                -assigned=[exists_and_equal assigned_p($action_id) 1]
+                -assigned=[expr {[info exists assigned_p($action_id)] && $assigned_p($action_id) == 1}]
         }
 
         #----------------------------------------------------------------------