Hi Edwin, I see the edit frame is showing on one of the edges. That likely means that you don't actually have an edge selected there, you've got a separate curve object selected there that is right on top of the edge.

Hide or delete the separate curve object so that you can select the edge.

- Michael

For something like a cylinder, select the "upper" round edge of the rounded part of the cylinder, not the edge of the planar circular top (if any), which would close the cylinder.

- Brian

hi michael.

yes, it was exactly like you said. had the curve selected and when i used both edges it worked fine.

thanks a lot!