Thanks for your reply Marion, guess I'll just load an older save, that will be the second time with this game. There was another point that I'd done something in a puzzle, checked it several times, all correct according to walkthroughs (which I'd been trying not to use!!) but then for some reason had to go to an old save and do a whole lot of things over again before it would work. Rather unusual, not something I've had to do with many if any games in the past!