Något gick fel: Swedish, literally "Something went wrong." Not very descriptive, isn't it?
The game should still exist. You might want to copy the folder with the game (they have same name) from your DomII directory to somewhere safe, and then just fool around and see if you can do the turn without any more crashes. You might want ot hit 'e' (gets you back to the nation select/host screen) every now and then, and instantly go back. This saves the orders you had done at that moment, and so you don't have to do everything every time.