I'm trying to do project 1, and have followed the video carefully. But when I select the extrude command, the workplane box is empty. I input the workplane to the box, but it gives me the error message ""Workplane has no real geometry. (Error 293)' using resolution 1E006"". I don't know what this means, but I can go no further with it. I can't even get started, and am getting frustrated. Any help would be appreciated.