I am trying to re-write Mage_Core_Model_Session_Abstract_Varien class in my custom module but getting error :

Recoverable Error: Argument 1 passed to Mage_Core_Block_Messages::addMessages() must be an instance of Mage_Core_Model_Message_Collection

What I have tried -



And ...Model/Product.php

class Test_HelloDeveloper_Model_Product extends Mage_Core_Model_Session_Abstract_Varien {

    public function start($sessionName=null)
        Mage::log('method overrided...', null, 'override.log');


What can be issues?

  • The error you have referenced is regarding the parameter you have passed to addMessages method. – Knight017 Dec 31 '18 at 8:26
  • After removing the parameter, facing the same issue. But when I print It's throwing different error - Fatal error: Call to a member function getItems() on null in app/code/core/Mage/Core/Block/Messages.php on line 115 – Mr. Nanhe Dec 31 '18 at 11:09
  • that means the collection of message is null – Knight017 Dec 31 '18 at 17:08

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