--- loncom/homework/optionresponse.pm	2004/12/04 00:41:26	1.122
+++ loncom/homework/optionresponse.pm	2005/01/10 19:21:57	1.123
@@ -1,7 +1,7 @@
 # LearningOnline Network with CAPA
 # option list style responses
 #
-# $Id: optionresponse.pm,v 1.122 2004/12/04 00:41:26 albertel Exp $
+# $Id: optionresponse.pm,v 1.123 2005/01/10 19:21:57 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -629,7 +629,10 @@ sub end_foil {
     if ($value ne 'unused') {
       my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
       &Apache::lonxml::debug("Got a name of :$name:");
-      if (!$name) { $name=$Apache::lonxml::curdepth; }
+      if (!$name) {
+	  &Apache::lonxml::error("Foils without names exist. This can cause problems to malfunction.");
+	  $name=$Apache::lonxml::curdepth;
+      }
       &Apache::lonxml::debug("Using a name of :$name:");
       if (defined($Apache::response::foilnames{$name})) {
 	  &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));