Most of the time it is a driver issue with the programming cable. At least with the windows machine it can be an issue.
I am sure someone will chime in with a "how to" remedy the situation for you.
Good luck
From: Charly Aurelia <caurelius1@gmail.com> To: chirp_users@intrepid.danplanet.com Sent: Thursday, February 23, 2017 10:58 AM Subject: [chirp_users] Linux User error message
Hello,
First time using CHIRP with a brand new Pofung UV82.
Every time I try to Download From Radio regardless of which port from drop down menu i choose), I get this type of message :
could not open port /dev/ttyUSB0: [Errno 13] Permission denied: '/dev/ttyUSB0'
I am pretty certain I am plugged into the port labeled USB0.
I have no idea how to change permission access to the port.