Thanks Ken Neil and Andy,
Yes, the issue is the last tool number in the file. I am not sure why I don’t remember that occurring in 1.2…x before but I was looking at the change in speed overrides more than anything else.
So, is there any possibility of doing something with tool numbers > 255 that Carbide3D uses to not cause errors? Maybe another check box configuration to send or not send that info on the tool change page?