--- loncom/interface/statistics/lonsubmissiontimeanalysis.pm	2006/08/18 15:15:38	1.27
+++ loncom/interface/statistics/lonsubmissiontimeanalysis.pm	2006/12/21 19:52:28	1.28
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonsubmissiontimeanalysis.pm,v 1.27 2006/08/18 15:15:38 raeburn Exp $
+# $Id: lonsubmissiontimeanalysis.pm,v 1.28 2006/12/21 19:52:28 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -135,8 +135,10 @@ sub BuildSubmissionTimePage {
             $r->print(&Apache::lonstathelpers::render_resource($resource));
             $r->print('<br />');
             $r->rflush();
-            $r->print(&analyze_times($r,$resource->symb,\@Students,
-                                     $current_problem->{'part'}));
+	    if (@Students) {	    
+		$r->print(&analyze_times($r,$resource->symb,\@Students,
+					 $current_problem->{'part'}));
+	    }
         }
         $r->print('<hr />');
     }