I'm in rhino and i have an outline of a panther that i want to cut on cnc router using deskcnc. I am able to save the file as dxf and i am able to open it in deskcnc but only some of the outlines in the panthers face will be as closed islands and most will be open enties. Yet when i go back to rhino all the lines are closed. What am I doing wrong? Thanks Brady