I'm trying to load a model with: Mage::getModel('OnePica_AvaTax/AvaTax_Estimate') but Magento errors with Warning: include(Mage\OnePica\AvaTax\Model\AvaTax\Estimate.php): failed to open stream: No such file or directory, when this model is in the Community folder, not the Core folder... Mage shouldn't be there at all.

I know I've dealt with this in the past, but I can't remember what the correct way to do this is.

1 Answer 1


The factory pattern Mage::getModel takes a specific input. This follows the form of [module]/path_to_class.

In the case of Avatax, the [model] is defined as avatax:

#file: app/code/community/Onepica/Avatax/etc/config.xml

So you will load the model with this:


Hope that helps!

  • Was about to say it didn't work, but case sensitivity caught me!
    – andyjv
    Sep 13, 2013 at 16:39

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