Software Problems - Night Fighting

I do not know if it is a peculiarity of my own system (Windows 8 on an Acer PC), as I have had one or two problems in the past, but the game frequently crashes during night fighting scenarios. The thing that seems to cause the crash is the use of flares when delivered by heavy artillery. Mortar illumination flares do not seem a problem. Usually the crash happens when the user delivers illumination rounds by heavy artillery, however on two occasions the game has crashed when the AI opponent uses illumination.

This is very frustrating as it has rendered some very exciting scenarios unfinishable!