--- loncom/homework/structuretags.pm	2011/07/28 03:13:58	1.495
+++ loncom/homework/structuretags.pm	2011/09/13 15:40:37	1.496
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.495 2011/07/28 03:13:58 raeburn Exp $
+# $Id: structuretags.pm,v 1.496 2011/09/13 15:40:37 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -208,7 +208,11 @@ sub page_start {
                 my $navmap = Apache::lonnavmaps::navmap->new();
                 if (ref($navmap)) {
                     my $mapres = $navmap->getResourceByUrl($map);
-                    unless ($mapres->is_page()) {
+                    my $is_page;
+                    if (ref($mapres)) {
+                        $is_page = $mapres->is_page();
+                    }
+                    unless ($is_page) {
                         $needs_upload = 1;
                     }
                 }
@@ -218,7 +222,11 @@ sub page_start {
                 my $navmap = Apache::lonnavmaps::navmap->new();
                 if (ref($navmap)) {
                     my $mapres = $navmap->getResourceByUrl($map);
-                    unless ($mapres->is_page()) {
+                    my $is_page;
+                    if (ref($mapres)) {
+                        $is_page = $mapres->is_page();
+                    }
+                    unless ($is_page) {
                         my $res = $navmap->getBySymb($symb);
                         if (ref($res)) {
                             my $partlist = $res->parts();