--- loncom/homework/structuretags.pm	2003/03/06 21:05:27	1.154
+++ loncom/homework/structuretags.pm	2003/03/07 23:41:29	1.155
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.154 2003/03/06 21:05:27 albertel Exp $
+# $Id: structuretags.pm,v 1.155 2003/03/07 23:41:29 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -241,6 +241,7 @@ ENDCHECKOUT
 sub start_problem {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
 
+  $Apache::lonhomework::parsing_a_problem=1;
   # meta is called from lonpublisher, which doesn't uses the normal
   # lonhomework method of parsing the file which means that inputtags 
   # won't get reset
@@ -476,6 +477,12 @@ sub end_problem {
     &Apache::lonxml::debug("in end_problem with $target, edit");
     $result = &problem_edit_footer();
   }
+
+  undef(%Apache::lonhomework::history);
+  undef(%Apache::lonhomework::results);
+  undef($Apache::inputtags::part);
+  undef($Apache::lonhomework::parsing_a_problem);
+
   return $result;
 }