This problem just happen today. I have been playing the game for more than a week now. Everything is fine, I have finish the game, after I load back the old save game to play some sub mission. Everything still good, then suddenly when I fast travel from BoS Safe House to any Novac and when go to my room, the game crash, I try to go to difference place to see and it happen the same thing, it only happen when I walk to some door. Any one have the same problem or solution for this.