Can anyone help with this wierd problem?
I decided to make a small control box to act as a second keyboard with only a few keys for using keyboard shortcuts .  I used a Teensey 4.0 controller programed to act as a usb keyboard.  I have two shortcuts made in M4 for cycle start and stop besides the movement keys. The new keyboard works perfectly in all windows programs. Windows 10 sees it as a standard keyboard.
When I run Mach4 everything is ok and regular key shortcuts work with regular keyboard.
When the new control box is pluged in and push the start key it runs one line of code and then stops and will not accept any other keyboard commands from either keyboard.
It does work with two standard keyboards hooked up though.
Why would Mach 4 not like something with this one?
I don't understand why every other program is ok with it but Mach4 is not.
Can someone please help me out?
Thanks

OK. for anyone that cares, I was my problem afterall. I was copying and pasting and it looks like I put two buttons on the same input amd never saw it. It didnt like a start and stop at the same time.

yup.. that's certainly good to know..