Run python script automaticly after halui on linuxcnc startup

are you running this as an axis usercommand file? I dont know what you are doing but you should still be able to connect to halui pins from a usercommand file

I could not use loadusr python3 myfile.py as linuxcnc through error, i think it is because i have delay Functions in my code.

I started linuxcnc and my script in /home/linuxcnc/.config/autostart <- created two desktop entry so it runs on startup

On my code i had to run it in terminal so my exec=xfce4-terminal -e "myfile.py"

I delay script by 10sec so linuxcnc axis gui can load correctly !

you didn't mention the acrual error so it's hard to know why loadusr python3 failed.
If it is because halui was not loaded yet, there is away to test for that.

Anyways glad u figured something out.