Posted in the bug section about errors I was recieving
I didn't realise you could back up saved games like Andrew pointed out in the bug thread so it looks like I've potentially lost my 125 year old game.
The database is just shy of 700 megs big. I've made a copy for Steve to look at should he require it I can always send it over.
Otherwise looks like i'm gonna have to start afresh with a new game. I'll have to backup the database now lesson learned