--- loncom/homework/structuretags.pm	2007/06/05 22:37:56	1.379
+++ loncom/homework/structuretags.pm	2007/06/11 20:52:29	1.380
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.379 2007/06/05 22:37:56 albertel Exp $
+# $Id: structuretags.pm,v 1.380 2007/06/11 20:52:29 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1225,6 +1225,13 @@ sub end_while {
 		$return = 0; $error=1; next;
 	    }
 	    $result.=&Apache::scripttag::xmlparse($bodytext);
+	    if ($target eq 'grade' || $target eq 'answer' ||
+		$target eq 'analyze') {
+		# grade/answer/analyze should produce no output but if we
+		# are redirecting, the redirecter should know what to do
+		# with the output
+		if (!$Apache::lonxml::redirection) { undef($result); }
+	    }
 	    $return = &Apache::run::run($code,$safeeval);
 	}
 	if ($error) {