Hi! Great game, though, I'm stuck and looking for hints. I've hit two dead ends:
1) In the basement lab with the various creatures and soldiers. I've used the feather and vial in several combinations and I can't get the elevator to run or find any other way out, except...
2) I can get back to the vampire room and release the vampire but the door is locked in the seance room below the vampire room. I was already stuck here before I found the creature lab, so this isn't working on the way out either. Hints?
Hmm. So, running around on another save (not in the creature basement), I'm getting this error, too.