Index: openacs-4/packages/acs-subsite/www/admin/group-types/groups-list.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-subsite/www/admin/group-types/groups-list.tcl,v
diff -u -N -r1.1 -r1.2
--- openacs-4/packages/acs-subsite/www/admin/group-types/groups-list.tcl	13 Mar 2001 22:59:26 -0000	1.1
+++ openacs-4/packages/acs-subsite/www/admin/group-types/groups-list.tcl	27 Oct 2014 16:39:50 -0000	1.2
@@ -2,7 +2,7 @@
 
 # sets up datasource for groups-list.adp
 
-if { ![exists_and_not_null group_type] } {
+if { (![info exists group_type] || $group_type eq "") } {
     error "Group type must be specified"
 }