Error message when starting pycnc

[ganafets82]

Hi there, I get this message when starting pycnc.py on the raspberrypi: OSError: [Errno 1] Operation not permitted: '/dev/mem'

starting as sudo works, but not as user pi. adding user pi to the group "kmem" to have access to /dev/mem didnt change something.

How can I get it working as normal user? Did I miss a hint?

Thanks!