Opencart error after updating store to 1.5.6

Hi,

I am getting following error after updating my store to 1.5.6 I think I am getting this error after re installation of override engine

Error -

Fatal error: Call to undefined method ControllerSaleOrder::hasAction() in /public_html/admin/controller/sale/order.php on line 1915

Steps for the error
Login to admin ---> Sales ---> Orders --- > when I click on view then getting above error

Please please help me to fix it

Are you using the newest version of vqmod?

DL

Did you rerun installation of override engine or vqmod or both after upgrading? Upgrading brought in a new, virgin index.php pair along with other files from the upgrade fileset.

Simple;

replace the file "controller.php" on the folder system/engine/ for the original file from your opencart version.

You can download the original version here;

http://www.opencart.com/?route=download/download