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I am using Magento version 1.9.2 with Porto theme. My site is running and working. But i installed onepage checkout plugin (IWD checkout suite- free version). After installing , I got this error in magento backend.

Mage registry key "_singleton/opc/observer" already exists

Magento backend error image

I tried deactivating plugin from file system but same error is coming.

Note: I have installed another magento without any porto theme and IWD checkout suite is working perfectly there.

TylerH
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geekhere
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1 Answers1

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Same problem now, try this:

Go to app/Mage.php

Find register function add in

if ($key == '_singleton/opc/observer'){
    Mage::log(debug_backtrace(false), null, 'backtrace.log');
}

Do this right before if (isset(self::$_registry[$key])) {

Then go to app/var/log/some_filename.log. There should be two entries. One is right and one is wrong (read duplicate). That should help you to find the offending file/function.

Mage registry key "_singleton/VladimirPopov_WebForms_Model_Observer" already exists

Community
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cris
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