I am trying to extend an existing part by opening a sketch on one of the planer surfaces, selecting the surface, and converting the edges. When I try to extrude the resulting sketch, which is fully defined, I get an error that says "The sketch has no contour geometry". I can not find anything on this in Help. I've even tried to delete all relations and then fully define the sketch, but I get the same error. The part I am trying to extend is a loft and the face i am converting for the new sketch is an end face.