Is it possible to generate a mesh in pro am with different coord systems in differnt regions? For example i am trying to mesh a large cylindrical domain with an internal feature in the centre which i wish to spin. I want the mesh around the feature to be trimmed cell in a cateasian sys and then a cylindrical to the edge of the domain, this is so i can have a plane in between that can slide. Any Ideas?? Cheers

Use a custom mesh.

You can break up the surface into two seperate closed surfaces. Create subsurface on the surface that contains the internal feature. Generate two extrusion layers, and modify them to different cell types. One is spinning and the other is stationary.