Thanks for responding. These CTD's occur when I want to start a fight with 40 vs 40 armies. With less units my computer doesnt give CTD's. It doesnt matter if I fight near a city or in open land. I haven't face a defending siege yet so I cannot tell wether it's due to this. I do use expanded deployment mod, but as I said with less units in an army I am able to fight despite the expanded deployment mod enabled. My computer has a 6 GB memory RAM (not the state of the art I know ) BTW I also use your music mod, very nice one! I don't know how to compress and send a save-file so can you tell me how to do it? However I do have the save file just taken before the battle starts. In the meanwhile I will put your sent file into my Napoleon data folder.