Sandbox issue

[L i am]

Hi, I am trying to do a scollop shape in a solid piece of wood, For this I would use sandbox/make from contours, and it has always worked for me before. Anyway I have greated 2 curves on 2 defferent, but intersecting planes I select both arc (A) and (C)hit /sandbox and the red is all I get.......any ideas please.

[Box]

The Sandbox tools basically work in the Z Plane, re-orientating the arcs will make it work.

Or you could split the arcs and do it in two sections.

[L i am]

I thought either yourself or Dave R would answer....geneous....thank you