--- loncom/homework/outputtags.pm	2001/01/11 19:21:53	1.4
+++ loncom/homework/outputtags.pm	2001/01/15 14:57:13	1.5
@@ -24,9 +24,13 @@ sub start_displayduedate {
     my $id = $Apache::inputtags::part;
     my $date = &Apache::lonnet::EXT("resource.$id.duedate");
     &Apache::lonxml::debug("duedatebox found $date for $id");
-    $result ='<table border="on"><tr><td>Due at '.
-      POSIX::strftime($format,localtime($date)).
-	'</td></tr></table>';
+    if ($date) {
+       $result ='<table border="on"><tr><td>Due at '.
+         POSIX::strftime($format,localtime($date)).
+	   '</td></tr></table>';
+    } else {
+      $result ='<table border="on"><tr><td>No due date set.</td></tr></table>';
+    }
   }
   return $result;
 }