Error message when saving

Hi

Before buying the commercial version, I am evaluating the free version Hikashop with Joomla 3.0. I encountered the following error whenever clicking "Save" button in Hikashop extension. Is that just the debug message or something wrong with the program? Thanks.

( ! ) SCREAM: Error suppression ignored for
( ! ) Notice: Undefined index: success in C:\wamp\www\joomla30\administrator\templates\isis\html\message.php on line 22
Call Stack
# Time Memory Function Location
1 0.0007 433824 {main}( ) ..\index.php:0
2 0.7108 14375104 JAdministrator->render( ) ..\index.php:60
3 0.7309 14660328 JDocumentHTML->render( ) ..\application.php:207
4 0.7309 14660328 JDocumentHTML->_renderTemplate( ) ..\html.php:462
5 0.9128 15297000 JDocumentHTML->getBuffer( ) ..\html.php:682
6 0.9138 15321184 JDocumentRendererMessage->render( ) ..\html.php:399
7 0.9146 15330032 renderMessage( ) ..\message.php:49

I remarked this line the messages gone.

// $buffer .= '<div class="alert ' . $alert[$type]. '">';

as below
===========================
<?php
/**
* @package Joomla.Administrator
* @subpackage Template.Isis
*
* @copyright Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/

defined('_JEXEC') or die;

function renderMessage($msgList)
{
$buffer = null;
$buffer .= "\n<div id=\"system-message-container\">";
$alert = array('error' => 'alert-error', 'warning' => '', 'notice' => 'alert-info', 'message' => 'alert-success');

if (is_array($msgList))
{
foreach ($msgList as $type => $msgs)
{
// $buffer .= '<div class="alert ' . $alert[$type]. '">';
$buffer .= "\n<h4 class=\"alert-heading\">" . JText::_($type) . "</h4>";
if (count($msgs))
{
foreach ($msgs as $msg)
{
$buffer .= "\n\t\t<p>" . $msg . "</p>";
}
}
$buffer .= "\n</div>";
}
}

$buffer .= "\n</div>";

return $buffer;
}

Got you. Thank you Jerome!