[AGoetz]

I think you may have a problem with the mod and limitations of the SEIV engine. There are places in designing ships where I can generate Range Check Errors, the two I've noticed so far are in number of Engines (try putting 33 engines on a ship) and Weapon Damage (try looking at a Massive Vorlon Planet Killer).
When a player does these the program just spits out a Range Check Error box, but what happens when the AI tries to do something like these? Could it be the cause of the occasional Fatal Exception?