I am using magento 1.9 C.E and I have this issue whenever I try to disable any module from app/etc/modules/Mymodule_Custom.xml


It throws the error Mage_Module_Helper_Data not found. I don't understand why it is coming and this is the problem with almost all the extensions that I'm using. Please help me out folks.

  • Can you give me the exact error. Bcoz I have face the same issue in past I can Help you in that – Murtuza Zabuawala Aug 20 '16 at 10:37
  • Maybe your helper class is getting called from some other module, check the stack trace of error in exception.log – huzefam Aug 20 '16 at 10:43
  • I have used a few extensions of this vendor and whenever, I'm trying to perform the activity of disabling the error is thrown. – Abhishek Dhanraj Shahdeo Aug 20 '16 at 10:58
  • Fatal error: Class 'Mage_Price_Helper_Data' not found in /var/www/html/eleczo/trunk/app/Mage.php on line 547 – Abhishek Dhanraj Shahdeo Aug 20 '16 at 11:00
  • The helper is probably still used by translations in XML. Search the XML files for module="mymodule_custom". Also, did you clear the cache? – Fabian Schmengler Aug 20 '16 at 21:00

The error

The error comes from the fact that the helper class of the module you're disabling is being used somewhere else in the code. For example, it could be:

  • In another module
  • In the templates

Find the file using it

So first, you need to find out what is the name of the helper.

To do so, open app/code/<codePool>/Mymodule/Custom/etc/config.xml and look for the following piece of code:


Here you have to take note the name of the node between <helpers> and <class>. In my example, it is module

Now, you need to find out where this helper name is being used.

To do so, you can use the following command on your Magento root folder:

grep -r "module" . | grep -v "app/code/<codePool>/Mymodule/Custom"

This command basically means:

Look for the string module in my Magento folder but exclude the result from app/code/<codePool>/Mymodule/Custom

Thanks to this command you should be able to find where your helper is being used outside of your module quickly.

Notice: the command above will not exclude the templates or layout files from the module. Thus if your helper is being used in the module templates/layouts those files will be displayed in the list. To avoid that you can add extra grep to the command for instance:

grep -r "module" . | grep -v "app/code/<codePool>/Mymodule/Custom" | grep -v "app/design/frontend/base/default/template/mymodule/custom"

Once you found the code

Once you've found the code, I can't tell you what to do as it's a case by case decision. If you're disabling the module, you should definitely remove that helper call and/or refactor the file where it's being used.

| improve this answer | |
  • I am not using the helper anywhere, not in that module or any other module or any phtml file. – Abhishek Dhanraj Shahdeo Sep 8 '16 at 8:14
  • Also, when I am removing the complete module that is deleting the module, it is throwing the same error. – Abhishek Dhanraj Shahdeo Sep 8 '16 at 8:15
  • @AbhishekDhanrajShahdeo yeah it is because your helper is definitely used somewhere. Give a try to my procedure – Raphael at Digital Pianism Sep 8 '16 at 8:16
  • I have checked the whole project, the helper is being used only in that module, when I'm completely deleting the whole code of that module, it is throwing the same error. – Abhishek Dhanraj Shahdeo Sep 8 '16 at 8:26
  • @AbhishekDhanrajShahdeo maybe you have compilation enabled ? Check under System > Tools > Compilation and disable it, recompile then reenable it. – Raphael at Digital Pianism Sep 8 '16 at 8:31

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