An online machine shop wants to work from an IGES file. The file was created in Rhino 5.0. If I open the 3dm file in Rhino 5, and then attempt to use “Save As…” I am given IGES as one choice. However, when I try to proceed, the directory suddenly goes blank except for an old folder containing a Bongo render.
Same basic problem if I try to save the 3dm file as an STL. All the files in the folder vanish from view except the old Bongo render.
Curious business. Thank you for your insights on how best to convert a 3dm file to IGES. Many thanks. Michael