extrude command

 From:  Michael Gibson
2998.3 In reply to 2998.1 
Hi andras, looks like Burr has you covered here, thanks Burr!

Usually if an extrusion will not cap it means either the curve was not planar, or not closed, or it possibly has a self intersection (crosses over itself) in it somewhere.

Please let me know if you need any more help with this one.

- Michael