--- loncom/lonnet/perl/lonnet.pm	2015/04/01 23:22:13	1.1279
+++ loncom/lonnet/perl/lonnet.pm	2015/04/09 17:46:54	1.1280
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # TCP networking package
 #
-# $Id: lonnet.pm,v 1.1279 2015/04/01 23:22:13 raeburn Exp $
+# $Id: lonnet.pm,v 1.1280 2015/04/09 17:46:54 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -7271,13 +7271,15 @@ sub has_comm_blocking {
                                 if ($mapsymb) {
                                     if (ref($navmap)) {
                                         my $mapres = $navmap->getBySymb($mapsymb);
-                                        @to_test = $mapres->retrieveResources($mapres,undef,0,1);
+                                        @to_test = $mapres->retrieveResources($mapres);
                                         foreach my $res (@to_test) {
                                             my $symb = $res->symb();
                                             next if ($symb eq $mapsymb);
                                             if ($symb ne '') {
                                                 @interval=&EXT("resource.0.interval",$symb);
-                                                last;
+                                                if ($interval[1] eq 'map') {
+                                                    last;
+                                                }
                                             }
                                         }
                                     }