See enclosed, why can only 3 out of 4 paths be selected before moving to the cross section sub-step. The guide path keypoint curves are all identical in geometry and connected to the cross section in the same way.
Thanks in advance
sorry for that silly question, but why do You need a sweep surface for such a geometry?
If more path curves are necessary You also can use BlueSurf instead, or You use a Loft Feature rather than a Sweep.
@hawcadgood question! It's a simple extrusion (surface or body).
You can "only" 3 paths in Sweep command (F1 helps).