--- loncom/interface/lonhelper.pm	2018/08/29 20:21:30	1.201
+++ loncom/interface/lonhelper.pm	2018/09/03 16:43:47	1.202
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # .helper XML handler to implement the LON-CAPA helper
 #
-# $Id: lonhelper.pm,v 1.201 2018/08/29 20:21:30 raeburn Exp $
+# $Id: lonhelper.pm,v 1.202 2018/09/03 16:43:47 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -3327,7 +3327,7 @@ sub start_group {
     if ((!$paramHash->{'grouponly'}) || (&Apache::lonnet::allowed('mdg',$Apache::lonnet::env{'request.course.id'}))) {
         %curr_groups = &Apache::longroup::coursegroups();
     } elsif ($Apache::lonnet::env{'request.course.groups'} ne '') {
-        map { $curr_groups{$_} = 1; } split(/,/,$Apache::lonnet::env{'request.course.groups'});
+        map { $curr_groups{$_} = 1; } split(/:/,$Apache::lonnet::env{'request.course.groups'});
     }
     foreach my $group_name (sort {lc($a) cmp lc($b)} (keys(%curr_groups))) {
 	push(@{$paramHash->{CHOICES}}, [$group_name, $group_name]);