Fatal error: Call to undefined method Mage_Tm_Googlemap_Helper_Data::__() in /home/mypetshop/public_html/app/code/core/Mage/Admin/Model/Roles.php on line 160

I get this error when I try to Add new roles in my Magento Admin panel or edit an existing role.


Most probably, you are using a module called "Tm_Googlemap" that has an admin configuration area. When a module uses the admin configuration and role system, it must have a Helper-class defined for translations. I guess you can find the module in app/code/(local|community)/Tm/Googlemap/, and it will have a system.xml and adminhtml.xml in its etc/-directory.

There you will find a node like:

<tm_googlemap_options module="Tm_Googlemap">[...]

Then, go into the module's config.xml file. Either there is already a node global/helper, or you must create a new one:

    <Tm_Googlemap> <!-- make sure you use the string from modules="..." -->

After this, check the module directory again. If there ist no folder Helper/ with a file called Data.php, create it. Then, insert these contents:


class Tm_Googlemap_Helper_Data extends Mage_Core_Helper_Abstract {}

Flush cache, logout and login from the admin panel - it should work then! Make sure to uncomment the line you commented, changes in the /core/-directory are no-go im Magento.

  • Thanks @simonthesorcerer but all files exist properly the way you showed in your answer! I am confused what i have to do? – Saif Usmani Jun 10 '16 at 9:17
  • Does the string in module="" and the helper class from the config.xml match? You could also check adminhtml.xml – simonthesorcerer Jun 10 '16 at 15:19

Is this Your module or third party extension? Probably the class Mage_Tm_Googlemap_Helper_Data does not exists, have typo in name or is not defined in module config


Also check if this module extends Mage_Core_Helper_Abstract

  • I am new in Magento. I know the class Mage_Tm_Googlemap_Helper_Data does not exist. How to check if this module extends Mage_Core_Helper_Abstract??? Please guide. – Saif Usmani May 25 '16 at 9:29
  • One thing I can say is this error occurs due to some third party extension (plugin) I have installed but which plugin I really don't know. – Saif Usmani May 25 '16 at 9:35

After all my research found a quick fix. Just comment the line on which you are getting error. In my case I commented line no. 160 in app/code/core/Mage/Admin/Model/Roles.php

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