Playing as Aragon, the year is around 1250. I get a CTD every time I take Toulouse from the French. I have not had this problem with any other settlement. I have tried waiting 10+ turns and than trying to take Touolouse again but the CTD still occurs. The CTD occurs:

1) sometimes immediatly after taking the settlement (it doesn't matter if I do the battle in the battle screen or if I calculate automaticaly).

2) if after taking the settlement the game doesn't crash (it happens sometimes), it crashes when trying to save the game immediatly after

3) if I don't try the save the game the game crashes when I click end turn.