Crash on loading? CTD the moment the game has loaded?
Possibly a corrupted save game. Nothing the EB team can do anything about. It's an RTW thingy.
I save at least once per game year and always keep the saves from 10 year prior. If it happens then I'm sure there will be at least one save game that still works.
Look in the frequent issues thread (in the important info thread) for (a little bit) more info about this.
If it is however a CTD during the end turn, then maybe there's more we can do...
Bookmarks