Posted:Michael Gibson
In order to avoid it you'll need to make the cut away portion not have quite as tight of a bend right near the end.


Ok, thanks, thats a handy tip and thanks for technical explanation as to why the error is occuring.


Posted: Andrei Samardac
Just extract isocurves from blend, repair them, then run LOFT (loose exact).


That tip is gold, thanks Andrei
I just tried isocurves for the first time with loft->loose-exact and gives a great result for my purposes. I can see myself using this a lot to solve certain problems.