Hi Pilou,

> If you select one arsc the sweep 2 rails works
> If you select the other arc the sweep 2 rails works
>
> If you join the 2 arcs the sweep 2 Rail works
>
> If you select the 2 arcs (not joined) the Sweep 2 rails don't works

Yup, and that's all normal... Anthony, when you do a Sweep each particular "station" along the sweep should be made up of 1 curve - if you have multiple pieces then use the Join command first to join them together into one logical curve so that the sweeper will know what the profile is supposed to be at that station.

The sweeper does not know how to process multiple separate profiles that exist at a single location along the sweep - you need to configure your curves using Join so that you have one single curve at each station.

Either that, or if you want to have multiple curves at a single station then you would need to do Sweep multiple times, each time using just one of the curves at that station.

- Michael