Default Currency Problem

I am using latest version of csc. I am trying to configure my fn.init.php file which need to change default currency to secondary currency. I am following the steps from [url]CS-Cart Documentation — CS-Cart 4.15.x documentation but when i change first step it shows error


Fatal error: Call to a member function assign() on a non-object in /home/******/public_html/csc/core/fn.init.php on line 457

guys please help.

And what did you change in the fn.init.php? You can change the default currency in the backend.