Well for a game that's a joke, and apparently fit for the garbage can, by your own admission, you appear to have been able to complete quite a lot of missions without too much trouble.
In short. Go to the gramophone player in your submarine, and put another record on. This 'my life is over because a program which attempts to simulate one of the most complex machines in history in the world's biggest ever conflict has got a few errors in it' moan is getting a little tired.
The Tipperary song, bitte.