Colin, good thing you're here to remind me of crap. I did the same thing yesterday on a mill definition and it fixed and I remember thinking I need to go back thru and redo all of our machine def's. Worked a treat! Thanks Colin.

Yep, ever since Colin did the CD Defaults on the Pro Tips section I do this religiously. Definitely preserves the hair follicles. I would recommend anyone to read that post.

Oh, that's a great idea! I didn't think of that. I will ask them ASAP. Thanks for the insight

The files were already there and had been for a few years. I didn't change the machine def's at all, but I checked them when I installed MC on Win10 and all of the paths were correct. As they should have been. I didn't give much thought to resetting the paths to what was already there until I happened to do it yesterday, and when Colin put his post up it jogged my memory. Yeah, all of those paths stayed the same and are correct. Just re-doing the post processor fixed my problem.

Glad my info fixed it! The other thing for everyone to remember to check, is the "Files Page" in the Control Definition. Here you can associate: Tool Libraries Setup Sheets Operation Defaults Operation Libraries Make sure all of those are pointing to [Your Mastercam Version > Local File Path Locations].

Well aware on the default directories Mastercam installs to (2020 is like the 14th/15th version of Mastercam I've installed and used). Been running this setup for 2-3yrs without a hitch until I had to upgrade my pc to Win10. All files and paths are set correctly. I'll try deleting and resetting the paths to the post processors. Anything is possible at this point. Thanks Colin.

Try opening each of your Control Definition Files, using the Control Definition Manager. In the Post Processors dialog, delete all of the file paths. (No Posts attached, only "Default Settings for Control Type".) Save the Control Definition. Now, open the same CD, and verify that no paths exist under Post Processor drop-down path menu. Go through the "default" settings, and make sure all is set correctly. Now, use the Post Processor dialog, and add "your Post". Close the dialog box. Now, choose the Post Processor Drop-down list, and choose the new File Path (your Post). A plus sign (+) should show next to the path. Press 'save', and it will turn into a Green Check Mark. Do this for all your Control Definition files. Those saved paths are 'static file paths'. I think Windows goes looking for paths that might no longer exist.

I had MS One Drive hijack My Mastercam folders which really slowed things down Things got back to normal once I figured it out and fixed it

Wireframe -> Bounding Box -> Center Point?