--- loncom/homework/lonhomework.pm	2025/01/17 01:05:19	1.344.2.10.4.9
+++ loncom/homework/lonhomework.pm	2025/01/17 15:41:26	1.344.2.10.4.10
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Homework handler
 #
-# $Id: lonhomework.pm,v 1.344.2.10.4.9 2025/01/17 01:05:19 raeburn Exp $
+# $Id: lonhomework.pm,v 1.344.2.10.4.10 2025/01/17 15:41:26 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2028,13 +2028,15 @@ sub get_lti_score {
         my $iterator;
         if ($mapurl ne '') {
             my $map = $navmap->getResourceByUrl($mapurl);
-            my $firstres = $map->map_start();
-            my $finishres = $map->map_finish();
-            my $recursive = 1;
-            if ($pbscope eq 'nonrec') {
-                $recursive = 0;
+            if (ref($map) {
+                my $firstres = $map->map_start();
+                my $finishres = $map->map_finish();
+                my $recursive = 1;
+                if ($pbscope eq 'nonrec') {
+                    $recursive = 0;
+                }
+                $iterator = $navmap->getIterator($firstres,$finishres,undef,$recursive);
             }
-            $iterator = $navmap->getIterator($firstres,$finishres,undef,$recursive);
         } else {
             $iterator = $navmap->getIterator(undef,undef,undef,1);
         }