--- loncom/interface/lonmsg.pm	2005/06/06 21:06:14	1.148
+++ loncom/interface/lonmsg.pm	2005/06/07 13:42:51	1.149
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Routines for messaging
 #
-# $Id: lonmsg.pm,v 1.148 2005/06/06 21:06:14 www Exp $
+# $Id: lonmsg.pm,v 1.149 2005/06/07 13:42:51 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1799,11 +1799,11 @@ sub displaymessage {
 	if (&Apache::lonnet::allowed('vgr',$env{'request.course.id'})) {
 		$r->print('<td><b>'.&Apache::loncommon::track_student_link(&mt('View recent activity'),$content{'sendername'},$content{'senderdomain'},'check').'</b></td>');
 	    }
-	if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
+	if ((&Apache::lonnet::allowed('opa',$env{'request.course.id'}) && $symb) {
 	    my $symb=&Apache::lonnet::symbread($content{'baseurl'});
 	    $r->print('<td><b>'.&Apache::loncommon::pprmlink(&mt('Set/Change parameters'),$content{'sendername'},$content{'senderdomain'},$symb,'check').'</b></td>');
 	}
-	if (&Apache::lonnet::allowed('mgr',$env{'request.course.id'})) {
+	if ((&Apache::lonnet::allowed('mgr',$env{'request.course.id'}) && $symb) {
 	    my $symb=&Apache::lonnet::symbread($content{'baseurl'});
 	    $r->print('<td><b>'.&Apache::loncommon::pgrdlink(&mt('Set/Change grades'),$content{'sendername'},$content{'senderdomain'},$symb,'check').'</b></td>');
 	}