Sweep1 problem

Section%20variable.gh

Section%20variable_base.3dm

Hello,

I've made this gh file in order to have a variable section along a rail (polyline). I divided the polyline in different zones that can be gathered in two categories :

- the main body of the segments where the size of the section varies

- around the kinks where the size of the section remains constant

My idea was to use a "sweep1" at the kinks because gh deals really well with the transition. Unfortunately at the end of the process, the sweep1 does not work and I cannot understand why. When I bake the rail and the transversal section, I can "sweep1" it manually without any problem in Rhino. 

Any suggestion to solve this problem ?

Thanks !

Lucas