I am trying to cap a shape, it is fully closed from looking at its properties and using show naked edges. Even drawing a poly-line rectangle and extruding I am unable to cap planar holes. I have attached a picture of the message given when unsuccessful in capping. Any help is appreciated.
there is absolutely no chance somebody can help if you dont attach your file. many things can happen, the polyline not being completely planar being one of them.
What the command line message is telling you is that you can’t cap a solid.
Its kinda stupid that they put it in the Solids menu because it will never work on a solid.
The purpose of Cap command is if you have a planar hole (or holes) in a surface or a polysurface it will fill the hole(s). It is equivalent to running DupBorder and then making a planar surface and then joining. It will only work when a hole is planar.
I don’t know what you want to do with your solid, but cap is definitely not the command that will do it.