I'm trying to import a SW File into Autodesk Multiphysics, but it not letting me.  I have tried saving my file as an iges and STEP file but multiphysics keeps giving me the error: CAD import aborted: no part sent over for importing.  The SW file that I have is a 3-D sketch (frame model).  My plan was to add profiles to the sketch once I got file imported and any bugs worked out.  If anyone has any suggestions I would appreciate it.