I have a 2D sketch which has straight lines and splines - those entities are together supposed to form a closed shape, but I suspect there are gaps between the ends of the entities. When I attempt to extrude the sketch, I get "sketch has more than one open contour", which I suspect is because there are gaps in the sketch.
I can't figure out how to merge or join the individual entities into one closed shape, and/or to eliminate the error in extruding. (I suppose to close the gaps the splines would have to adjust some).
Note I tried to use "repair sketch", but it didn't seem to do anything ....