I have a weird problem when trying to create user roles. It gives me the following error:

Fatal error: Class 'Mage_Notificationmanager_Helper_Data' not found in /public/app/Mage.php on line 547

I don't see a module called notificationmanager. All I can find is a notificationmanager module from wyomind, but when I turn this off the error stays the same.

This is on line 547 in Mage.php:

public static function helper($name)
        $registryKey = '_helper/' . $name;
        if (!self::registry($registryKey)) {
            $helperClass = self::getConfig()->getHelperClassName($name);
            self::register($registryKey, new $helperClass);
        return self::registry($registryKey);

The config file of Wyomind:

<?xml version="1.0"?>
 * @category   Wyomind
 * @package    Wyomind_Notificationmanager
 * @license    http://Wyomind.com
  • provide config.xml file of Wyomind module Apr 3 '17 at 11:59
  • I added the config.xml to my question Apr 3 '17 at 12:06
  • provide this module adminhtml.xml file I pretty sure error is there Apr 3 '17 at 12:37

IN your config.xml file in global node add below code


and check and let me know


Create Data.php inside 'Wyomind/Notificationmanager/Helper' module.

class Wyomind_Notificationmanager_Helper_Data extends Mage_Core_Helper_Abstract


Clear cache.

  • Thank you for your answer, but the Data.php was already there with the same code as you showed me. Do you have an alternative answer? Apr 3 '17 at 11:54

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