Here comes an update on the matter. When we call it a spline, it can be any spline, fence, track or catenary. I discovered, by order of fluke (!), that if you have let's say a stubborn track that does not move, erase, go up or down, or nothing: Object, spline nor anything we have, you can attach another piece of track (anybody knows that by now). And it still does not move! SO, here goes the twist: Attach a MIN piece of track (small one so you can move easily, and do this with one of these that are height adjustable). Now move the MIN and the stubborn track will move finally! At this point, you can move up or down the MIN and the stubborn track also moves! This brings a partial crazy solution to the problem: Attach two MIN's to each end of the stubborn track, and move them both to an area of the map where you can lower both underground. The stubborn track will be there, down and under. Delete the MIN's and if you made the stubborn track as small as you could put these MIN's as close as possible, you will have a very small section of undeleted stubborn track away forever. Hope this makes sense, even if it does not make sense we have to go that far to solve a problem. Why all this? who knows, but it solves my problem. Any comments?