--- loncom/homework/grades.pm	2009/12/09 17:53:55	1.582
+++ loncom/homework/grades.pm	2009/12/09 19:41:10	1.583
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # The LON-CAPA Grading handler
 #
-# $Id: grades.pm,v 1.582 2009/12/09 17:53:55 raeburn Exp $
+# $Id: grades.pm,v 1.583 2009/12/09 19:41:10 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -7386,7 +7386,12 @@ sub scantron_validate_doublebubble {
     #get scantron line setup
     my %scantron_config=&get_scantron_config($env{'form.scantron_format'});
     my ($scanlines,$scan_data)=&scantron_getfile();
-    &scantron_get_maxbubble();	# parse needs the bubble line array.
+    my $nav_error;
+    &scantron_get_maxbubble(\$nav_error); # parse needs the bubble line array.
+    if ($nav_error) {
+        $r->print(&navmap_errormsg());
+        return(1,$currentphase);
+    }
 
     for (my $i=0;$i<=$scanlines->{'count'};$i++) {
 	my $line=&scantron_get_line($scanlines,$scan_data,$i);
@@ -7626,9 +7631,6 @@ SCANTRONFORM
         return '';
     }
 
-    &scantron_get_maxbubble();	# Need the bubble lines array to parse.
-
-
     # If an ssi failed in scantron_get_maxbubble, put an error message out to
     # the user and return.