I've began a game with France and want to save on july 1915. The game as freeze and then crashed while saving. I've tried to load the save anyway but it seems to be corrupted. I'm happy this is not my only save game but I think I've lost a big part of it (almost I've lost the entire german occidental army encerclement!)
I let the save with this message, if it can help to find a bug (As I've attached I remark there's no Juillet 1915.map, but only France.map from the last save)
Just an edit: to say I've changed France. Map name in Juillet 1915 name, and it work but the control of the regions I've gained between the two saves. So not the save was corrupt, but something crashed the PC while beginning saving the map.