Yes it seems to load the file fine and the tool path updates fully. I even tried regen again. Same thing.
I've never seen this before either. I tried to simulate by making two files, one a copy of the other except for one G-code difference.
I saved them in separate directories so they could have the same name.
I loaded one in Mach and looked at it. Then unloaded it. In explorer I copied the other one over the original.
I loaded the file again in Mach but it was fine and showed the changes.
Not sure if this is exactly what goes on with what I was doing. Could be the operations are handled differently by Windows.
I guess I'll forget it for now.
I'm getting good at shutting down and starting up Mach. anyway. Once I get the PCB-Gcode parameters figured out as to what they affect in the G-code hopefully I won't have to do it much.
Thanks for your help and quick response Hood.
Sage