Good day Art, I have looked at the version and for the Mach4 it is Build 2157, Version 4.0.1.2157. It has taken my code so it is licensed now. I had, and did again, copy the 2 files to the plugin folder and they still do not show up in the Mach4 plugin drop down. I think I may have installed a couple of different versions of Darwin, so maybe I need to uninstall everything and try again. Thanks for your help, I know it is the Holidays, so no hurry on a reply. Tom