Crash and lost game

Amazingly twice in about 4 hours, I load up the game after tea, but it wont actually load properly and crashes during texture loading with an error message. doesnt go away so force close game. then its lost its menu and then the spandau map data disappears.

why, for the love of all things, is this game so tempormental!

System specs, please!

HI,
it's not to do with that because the game of Berlin works. I've driven all the lines weather buses etc as you will see by my posts on the forum. However every few days, probably my fault, causes the game to revert to a map of Berlin with only a river and a glitches road on it. Other players have stated this as well, a it's part of this zeitlung error thingy lol. Just a bit annoying that I am reinstalling because of it. Basically.