--- loncom/homework/imageresponse.pm	2005/01/31 22:47:43	1.58.2.1
+++ loncom/homework/imageresponse.pm	2005/01/31 23:09:55	1.61
@@ -2,7 +2,7 @@
 # The LearningOnline Network with CAPA
 # image click response style
 #
-# $Id: imageresponse.pm,v 1.58.2.1 2005/01/31 22:47:43 albertel Exp $
+# $Id: imageresponse.pm,v 1.61 2005/01/31 23:09:55 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -272,7 +272,6 @@ sub gradefoils {
     }
     my $responsestr="$x:$y";
     my $part=$Apache::inputtags::part;
-    my $id = $Apache::inputtags::response['-1'];
     my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
     if ($result 
 	&& $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
@@ -345,7 +344,10 @@ sub start_foil {
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
 	$target eq 'analyze') {
 	my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
-	if ($name eq '') { $name=$Apache::lonxml::curdepth; }
+	if (!$name) {
+	    &Apache::lonxml::error("Foils without names exist. This can cause problems to malfunction.");
+	    $name=$Apache::lonxml::curdepth;
+	}
 	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));
 	}