I create a simple rectangle. Then I round one end by making a circle that is tangent with one end and the two sides and trim the two corners and the inside half of the circle off. I then join the half circle and the three sides of the rectangle into one shape. I then extrude this shape into a solid, but no matter what I do I can't get it to cap the ends. Even if I select "cap ends" it won't do it. I back up and just select the shape and try to create a plane. It won't do it. I can't figure out what is wrong with it. Can you help?
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