3D tube surfaces?

looking for help creating 3D tube surfaces in Rhino 7. I’ve attempted to “extrude along a curve” a circle with the path curve defined by a “group” of lines and arcs AND a path curve made of “joined” lines and arcs with NO joy…


have you tried with Sweep1? and also the lines should be Joined, not “grouped”
also you have the tool Pipe which is meant for that.


thanks!! “sweep1” does exactly what I was looking for