--- loncom/interface/statistics/lonproblemanalysis.pm	2004/10/04 19:10:26	1.91
+++ loncom/interface/statistics/lonproblemanalysis.pm	2004/10/04 19:49:41	1.92
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonproblemanalysis.pm,v 1.91 2004/10/04 19:10:26 matthew Exp $
+# $Id: lonproblemanalysis.pm,v 1.92 2004/10/04 19:49:41 matthew Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -663,6 +663,18 @@ sub OR_tries_analysis {
     if (defined($Concepts)) { $num_concepts = scalar(@$Concepts); }
     #
     for (my $try=$mintries;$try<=$maxtries;$try++) {
+        if (! defined($response_data{'_total'}->[$try]) ||
+            $response_data{'_total'}->[$try] == 0) { 
+            if ($try > 1) {
+                $analysis_html.= '<tr><td align="center" colspan="4"><b>'.
+                    &mt('None of the selected students attempted the problem more than [_1] times.',$try-1).
+                    '</b></td></tr>';
+            } else {
+                $analysis_html.= '<tr><td colspan="4" align="center"><b>'.
+                    &mt('None of the selected students have attempted the problem').'</b></td></tr>';
+            }
+            last;
+        }
         my $concept_graph='';
         if ($num_concepts > 1) {
             #