--- loncom/homework/structuretags.pm	2002/12/05 23:26:24	1.143
+++ loncom/homework/structuretags.pm	2003/03/14 23:27:19	1.144.2.1
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.143 2002/12/05 23:26:24 albertel Exp $
+# $Id: structuretags.pm,v 1.144.2.1 2003/03/14 23:27:19 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -252,6 +252,7 @@ sub start_problem {
   $Apache::inputtags::part='0';
   @Apache::inputtags::responselist = ();
   @Apache::inputtags::previous=();
+  @Apache::inputtags::previous_version=();
   if ($target ne 'analyze') {
     &initialize_storage();
     if ($target eq 'web') {
@@ -411,7 +412,7 @@ sub end_problem {
   my $result='';
   my $status=$Apache::inputtags::status['-1'];
   if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' || $target eq 'tex') {
-    if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
+    if ( $target eq 'grade' && $Apache::inputtags::part eq '0' && $status eq 'CAN_ANSWER' ) {
       # if part is zero, no <part>s existed, so we need to the grading
       &Apache::inputtags::grade;
     } elsif ( ($target eq 'web' || $target eq 'tex') && $Apache::inputtags::part eq '0' && 
@@ -661,6 +662,7 @@ sub start_part {
   $Apache::inputtags::part=$id;
   @Apache::inputtags::responselist = ();
   @Apache::inputtags::previous=();
+  @Apache::inputtags::previous_version=();
   if ($target eq 'meta') {
     return &Apache::response::mandatory_part_meta;
   } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {