This has happened to me several times on the same campaign now and i think i the reason is with the generals. (Maybe selected generals as I havent the courage to try all cos of all the CTD). but i notice everytime i placed them in the city, or dock them in the ships or reassign the heir, i get CTD as soon as i click on the next turn.
Note: as i said only some of the general have this problem as i havent tried all since i have like 30 generals. and it doesnt happen when i camp them in the fort. it also doesnt happen to my ruler which i always placed them in rome once they are the new leader.
With this issue it also means I cannot promote them to legate once they served 10 years and/or cant upgrade their armours and weapons since i fear for placing any of them in the city anymore.
if u guys need screenies on the generals i am referring to, i will do so.
EDIT: can someone show me how to do the show-err command and where to place it. I will be glad enough to find what the error is and post it here to you all that wants to see it.