Quote Originally Posted by creinold View Post
I am away from a computer for a few weeks so I can't check right now for the actual file name... Nothing like trying to help support a contribution in just an iPhone. LOL. =)
True dedication, on jolly holidays and refuses to be wrestled off the zencart forum!

Anyway, I had posted a problem a few posts back and incase anyone else has the problem here's what to do. I was installing fec 1.8.3 on a 1.3.7 zencart. I was getting the error:Fatal error: Call to undefined function zen_get_multiple_tax_rates() in C:\xampp\htdocs\bmlc\includes\classes\order.php on line 450

the problem was that the order.php file that gets installed with fec overwrites the one for zencart 1.3.7. I had to get the newest zencart and search it for the function which was in includes\functions\functions_taxes.php on line 105. I copied the block of code (down to line 157) into my old 1.3.7 version of includes\functions\functions_taxes.php. So far that seems to have done the trick.