Did you ever have one of those days where you smack yourself in the forehead, and say "oh, for fuck's sake, I can't believe I missed that!"
I had such a moment a few minutes ago.
I'm in the new bedroom cell in the GECK, looking over the navmesh, and trying to figure out why the companions-in-tow get to the top of the steps leading down to the bathroom, and won't go any further; eventually warping into the sauna to continue following.
I have visions of it being esp problems to do with the number of triangles in the navmesh, or something corrupt...
I look at the stairs...
...and I fucking forgot to attach the navmeshing at the top of the stairs to that at the bottom. The two separated, the companions can't figure out how to get from one to the other; and so won't sandbox between the two areas, and have to be warped by the game engine to follow you...
Y'know, some days I'm actually arrogant enough to entertain the notion that I really am that good a modder... and then things like this happen, and I realize I'm much more like the nutty professor.
So much knowledge locked up in there... and so little of an attention span for important details.
This, boys and girls, is why you should not navmesh nor bug test at five in the morning.
Going to start testing after my luxurious dinner of three day old pizza. Assuming nothing else is messed up... you'll be seeing the updated beta plugin sometime tonight.