Something doesn't seem right with the way the API works in World of Warcraft WotLK Classic. The usual method for getting expiration time on a debuff [UnitDebuff() and UnitAura() don't seem to function as they do in the retail version or as reported on wowprogramming.com. What is stranger is that it seems to work properly for the function around line 250, but returns nil at line 487 in a different function. It may have something to do with how it is being applied to a local var instead of a frame. I will post on the dev forums and see what I can find out.