--- loncom/interface/lonnavmaps.pm	2016/03/28 12:39:43	1.518
+++ loncom/interface/lonnavmaps.pm	2016/04/04 00:34:37	1.519
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.518 2016/03/28 12:39:43 raeburn Exp $
+# $Id: lonnavmaps.pm,v 1.519 2016/04/04 00:34:37 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2788,11 +2788,14 @@ sub recurseup_maps {
     my ($self,$mapname) = @_;
     my @recurseup;
     if ($mapname) {
-        my @pcs = split(/,/,$self->getResourceByUrl(&Apache::lonnet::clutter($mapname))->map_hierarchy());
-        shift(@pcs);
-        pop(@pcs);
-        if (@pcs) {
-            @recurseup = map { &Apache::lonnet::declutter($self->getByMapPc($_)->src()); } reverse(@pcs);
+        my $res = $self->getResourceByUrl($mapname);
+        if (ref($res)) {
+            my @pcs = split(/,/,$res->map_hierarchy());
+            shift(@pcs);
+            pop(@pcs);
+            if (@pcs) {
+                @recurseup = map { &Apache::lonnet::declutter($self->getByMapPc($_)->src()); } reverse(@pcs);
+            }
         }
     }
     return @recurseup;