City Occupation CTD

[Dol Guldur]

I'm having a problem with a CTD that I have not been able to resolve. I have not come across it before and thought someone out there might be able to shed some light on the matter...

It occurred when an AI faction took control of a specific city. The CTD occurs when pressing the end-turn button at the end of that turn in which the city was taken.

It is not:

* character related (there are no characters present)
* recruitment related (only emissaries are available)
* building-construction related (all buildings take 2 or more turns to build)
* building-destruction-related (AI does not destroy - or cannot destroy in some cases- the buildings present)
* revolt related (revolts usually do not occur on the turn you take a city, which state I have tested)

What is left? I cannot duplicate the CTD playing as the former ai faction. I have the CTD turn saved for comparison but cannot work out what the difference it.

What could the AI be doing that I am not?

(and I have tested bribing the settlement back to my original faction and this causes no CTD when the end-turn button is pressed, so it is related to the occupation of that city).

Ideas anyone?