I have exactly the same problem it appends when I start a battle (large army (600) against large army(900) ). I've noticed that if I disband my army before starting the battle it start without crash, but during the battle it crash as well. Maybe during a reinforcement spawning, maybe a specifical unit make the game crash. Just supposition. the list of my mods : - ModLib - Hideout Party Limit removed 50 - Keep Own Fief - Recruiter - Xorberax's Training Field - Fix Siege AI - Fixed Crossbows and Bolts - Party AI Overhaul And Commands - BetterHorseCharges I had Rulership but i remove it according to what I read, it don't change at all. The exact message I have