I am playing Rome and it is only 272BC. My garrison in Arpi is threatened by small band of Epirotes which I go out and attack. They retreat. I attack again. I get the screen to click on the button to start the fight. I get the loading screen and the bar at the bottom gets about 20% of the way across and then I get an error message popup. "Medieval 2: Total War encountered an unspecified error and will now exit." I press 'escape' and Windows closes the program. Any ideas?