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[br][/br]Crashes and bugs are a slightly different issue. There can be many different reasons for them. Perhaps a mod is affecting the game, or maybe the game didn't save properly, or it's just a software error. I regularly encounter this problem myself – there's no one-size-fits-all solution, but I can offer two recommendations: clear the folder with mods/maps and save more often.
Besides the mods that were recommended for this scenario, there are no other mods installed. True, I ran the map on a non-licensed version today, but it was version 3.1, and then I replayed it at home in the evening, and there were no crashes at all in a couple of hours of gameplay.