end turn CTD

As the title says, you may be able to guess what my current problem is, for those of you that can't :p it is do with getting a CTD everytime I end a turn, I'm not sure what the problem is as I have only edited campaign based files, such as descr_regions, descr_strat etc. with the exception of descr_sm_factions descr_names, and descr_names_lookup. My only guess is that it is to do with the path that roads take, as I have added a region that is awkward to get to ( the top of Britain, well, the top of the bit of Britain that comes with RomeTW), however I have my doubts about this as I played a few turns using that settlement, and all was well, it was only after I changed and added to the pontic family tree, that I noticed this. Any help=great.
Thanks

EDIT: Sorted. Thanks for your help....