--- loncom/homework/structuretags.pm	2010/10/04 18:28:53	1.476
+++ loncom/homework/structuretags.pm	2010/10/28 00:27:56	1.477
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.476 2010/10/04 18:28:53 www Exp $
+# $Id: structuretags.pm,v 1.477 2010/10/28 00:27:56 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -783,7 +783,7 @@ sub init_problem_globals {
 	&Apache::lonhomework::reset_show_problem_status();
 	$Apache::lonhomework::ignore_response_errors=1;
     }
-    $Apache::functionplotresponse::callscripts='';
+    @Apache::functionplotresponse::callscripts=();
     @Apache::inputtags::responselist = ();
     @Apache::inputtags::importlist = ();
     @Apache::inputtags::previous=();
@@ -811,7 +811,7 @@ sub reset_problem_globals {
     undef($Apache::lonhomework::type);
     undef($Apache::lonhomework::scantronmode);
     undef($Apache::lonhomework::ignore_response_errors);
-    undef($Apache::functionplotresponse::callscripts);
+    undef(@Apache::functionplotresponse::callscripts);
     &Apache::lonhomework::reset_show_problem_status();
 }