--- loncom/homework/response.pm	2002/10/14 20:37:27	1.66
+++ loncom/homework/response.pm	2003/02/13 23:48:27	1.69
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # various response type definitons response definition
 #
-# $Id: response.pm,v 1.66 2002/10/14 20:37:27 albertel Exp $
+# $Id: response.pm,v 1.69 2003/02/13 23:48:27 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -68,7 +68,10 @@ sub start_hintresponse {
 
 sub end_hintresponse {
   pop @Apache::inputtags::response;
-  %Apache::inputtags::params=@{pop(@Apache::inputtags::paramstack)};
+  if (defined($Apache::inputtags::paramstack[-1])) {
+      %Apache::inputtags::params=
+	  @{ pop(@Apache::inputtags::paramstack) };
+  }
   return '';
 }
 
@@ -172,7 +175,7 @@ sub check_for_previous {
   my ($curresponse,$partid,$id) = @_;
   my %previous;
   $previous{'used'} = 0;
-  foreach my $key (reverse(sort(keys(%Apache::lonhomework::history)))) {
+  foreach my $key (sort(keys(%Apache::lonhomework::history))) {
     if ($key =~ /resource\.$partid\.$id\.submission/) {
       &Apache::lonxml::debug("Trying $key");
       my $pastresponse=$Apache::lonhomework::history{$key};
@@ -183,16 +186,17 @@ sub check_for_previous {
 	  $history=$1;
 	  $previous{'award'} = $Apache::lonhomework::history{"$history:resource.$partid.$id.awarddetail"};
 	  $previous{'last'}='0';
+	  push(@{ $previous{'version'} },$history);
 	} else {
 	  $previous{'award'} = $Apache::lonhomework::history{"resource.$partid.$id.awarddetail"};
 	  $previous{'last'}='1';
 	}
 	if (! $previous{'award'} ) { $previous{'award'} = 'UNKNOWN';	}
 	&Apache::lonxml::debug("got a match :$previous{'award'}:$previous{'used'}:");
-	last;
       }
     }
   }
+  &Apache::lonhomework::showhash(%previous);
   return %previous;
 }
 
@@ -204,6 +208,7 @@ sub handle_previous {
     } else {
       push(@Apache::inputtags::previous,'PREVIOUSLY_USED');
     }
+    push(@Apache::inputtags::previous_version,$$previous{'version'});
   }
 }
 
@@ -320,11 +325,14 @@ sub end_parameter {
   return $result;
 }
 
+sub reset_params {
+    %Apache::inputtags::params=();
+}
+
 sub setup_params {
   my ($tag) = @_;
 
   if ($ENV{'request.state'} eq 'construct') { return; }
-  %Apache::inputtags::params=();
   my %paramlist=();
   foreach my $key (keys(%Apache::lonnet::packagetab)) {
     if ($key =~ /^$tag/) {