You are correct. I forgot to sudo the first time.
I did try to run LinuxCNC with the new address.
I got the same error with the new address.
The demo runs. Computer is not connected to the mill so I don't know if signals are going to the port.
Thanks for your assistance.
It is not an error as noted on the warning, well not always, so you do need to test on a machine or use a DVM to check the output pins on the parallel port connector.
