If an error occurs when attempting use a port on NIX systems such as "Error initializing serial port for 'OUTS'" with the command OUTS or PFOUTS, the permission and/or owner settings may need to be set. Try the following.
chmod 600 /dev/ttyXX
chown filepro /dev/ttyXX
chgrp uucp /dev/ttyXX
where XX is the actual port e.g. (1a, 1A, 2a, 2A etc..)