Catastrophic AI Averni CTD

[Chris1959]

Its 124BC in current Romani campaign, I'm running 1.1 with fixes added and City mod, Allied legions, Force diplo and Darth's formation.
I keep getting a CTD on the Averni turn, I've reloaded several times gone back a couple of years and moved characters around, it appears to be the death of the Averni faction leader that's causing it, he's 66.
I've killed him battle and on switch to campaign CTD, I've seiged Gergovia with him in it and CTD when I try to assault or starve, when a relieving army arrives and I try to fight CtD, which ever way round I try to run I eventually get a CTD. I even used forced diplo to get Gergovia and it showed the leader as my govenor, then 2 turns later Ctd.
Most other Ctd's I've gotten around by going back and doing things slightly diffferently, but this one has really got me, any ideas? Could I kill the character to see if he is the cause?

All right I've worked round it by going back several years and doing things slightly differently, one good peice of advise from Foot in another post was to avoid a crash after a battle was to leave the stats screen for at least 30 seconds, I wish I'd known that earlier!!

Anyway I starved Gergovia and the leader to death seemed to work, thank God, but if I did try to assault CTD!!