Coupons

Hi how would I set up that a coupon cannot be used in conjunction with any specials, only full priced products?

I am using 1.5.3.1

Have been testing this out and there are a couple of issues with coupon:

1. once purchase has been made, the customers Id does not go into the coupon history, this also has to do with that they can use the same coupon again in-which I set it to only once.

2. when i apply another coupon it switches the discount with warning state it will use only one.

By default OpenCart won't do the special restriction. You can use this mod
http://www.opencart.com/index.php?route ... on_id=5152
to disable specials being part of the coupon discount