--- loncom/homework/response.pm	2007/10/17 00:22:51	1.181
+++ loncom/homework/response.pm	2007/11/05 11:46:08	1.182
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # various response type definitons response definition
 #
-# $Id: response.pm,v 1.181 2007/10/17 00:22:51 albertel Exp $
+# $Id: response.pm,v 1.182 2007/11/05 11:46:08 foxr Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -898,7 +898,7 @@ sub getresponse {
 	    $response = $env{'scantron.'.
 				 ($Apache::lonxml::counter+$offset-1+$line).
 				 '.answer'};
-	    if ($response ne "") {
+	    if ((defined($response)) && ($response ne " ")) {
 		last;
 	    }