Ever since a failed upgrade from 1.8.1 to 1.9.1 (rolled back now) coupon codes don't work for customers that are logged in. Works fine when not logged in. I just purchased an extension that lets me set customer error codes for coupons and when logged in the error is for the 'catch all' error - ie one that has no known reason.

I am thinking that maybe the file that controls coupon application is corrupt or somehow not successfully rolled back

Does anyone know what file applies coupons in the cart and checkout so I can re-install from a fresh down of our version?



1 Answer 1


Looks like this is a known bug in Magento CE 1.9. You can try this extension to fix it temporarily.

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