While you can create a SubD surface by revolving a curve, you can’t directly use an existing SubD edge - you have to create a curve from the edge, revolve that and then join the new surface to the existing SubD.
Wanting to revolve a SubD edge as a variant of extruding a new face onto a SubD object seems such an obvious thing to want to do that initially I couldn’t figure out what was going wrong (this behaviour is different from the sweeps, for example; and the command just stops before asking for the axis, without any explanation in the command history).
Could this capability be added please?
Jeremy