--- loncom/homework/radiobuttonresponse.pm	2004/10/21 03:34:06	1.96
+++ loncom/homework/radiobuttonresponse.pm	2004/12/23 17:08:22	1.97
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # mutliple choice style responses
 #
-# $Id: radiobuttonresponse.pm,v 1.96 2004/10/21 03:34:06 albertel Exp $
+# $Id: radiobuttonresponse.pm,v 1.97 2004/12/23 17:08:22 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -312,6 +312,9 @@ sub whichfoils {
 		&Apache::lonxml::error(&HTML::Entities::encode("No valid value assigned ($Apache::response::foilgroup{$name.'.value'}) for foil $name in <foilgroup>",'<>&"'));
 	    }
 	}
+	if (!$havetrue && $Apache::lonhomework::type ne 'survey') {
+	    &Apache::lonxml::error("There are no true statements available.<br />");
+	}
     } else {
 	my $current=0;
 	&Apache::lonhomework::showhash(%Apache::response::foilgroup);