I make backups everytime i stop the server (but thanks for the advice). I have it all scripted in linux, so all good. Just a pain to work out which mod as its an intermittent issue. Good to know that the building mod seems to not be the culprit. Its my must have mod for this game. I love building and the game just wouldnt be as fun with out (not to mention needing to build a new castle).
Only 2 of us, so everything takes a lot longer than if u had a clan.