Hi Ian, I just want to tell you that I figured out what the bug was for my old zombie map. I discovered it while playing around ont he kobold map. I had a test map but with the durations change, I guess it won't work right. It shouldn't be hard to find though. What happens is that the computer unit tries to move onto a structure that is evil or neutral. even when the default doesn't let multiple units ont eh same tile. So when the unit tries, it comes up with that error and says that there is a bug in the AI. You should be able to reproduce it yourself. The move skill should have the empty_tile flag, cause otherwise it won't pop up. al "The truth will set you free" Jesus Christ of Nazareth 33A.D.