Hi Shyam - What format have you been exporting to the machinist? If your using step or parasolid (shapr is parasolid native) the the export will have a log file that you can look at to ensure the export is good. Plus reimport it back into shapr or prefer another CAD system to check the import is good. As you say its been fine in the past so what has happened now? I don't use Mastercam but exports are usually good in most CAD systems... Peter