I'm Overriding Block. In module Config.xml


In Local/Modification/Block/Customer/Group/Edit/Form.php file content:

class Local_Modification_Block_Customer_Group_Edit_Form
    extends Mage_Adminhtml_Block_Customer_Group_Edit_Form
    protected function _prepareLayout()

All is working, but, if I disable this module from System -> Configuration -> Advanced "Local_Modification". I'm not get any form...

Have ideas, what is wrong?

  • This is magento default behavior at magento.it is disable all activity of this extension except observer/event.
    – Amit Bera
    Commented Jan 5, 2016 at 11:39
  • Well, I think if the module is disabled, then should not do rewrite, and run the default Block...
    – KSX K
    Commented Jan 5, 2016 at 13:13

1 Answer 1


This is a common misunderstanding. "Disable modules output" does not disable the module, it only hides its own blocks, so it's a quick way to remove elements of a module from the frontend but does not disable any custom functionality.

To disable a module, you must edit the files in app/etc/modules:


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