Well as always, if this bug is reproduceable (Ie you save, load your game, and get a crash on the same turn, and will always get a crash from this save on the next turn), then please upload a save so I can take a look. That's a critical bug, and would need to be fixed. If it's just late game, and the game is running slow, you get a MAF crash, you reload, play a few more turns, and it crashes again, that's machine specific. I have no way to fix that, it's an issue with your system's hardware/software. Currently I'm working on releasing a LoR light core, which will remove ethnic unit art, and ethnic city artt. That should help with the users that are getting MAFs. However I'm rebuilding the ArtDefinesUnit file from scratch here, and this is going to take a bit.