Linux cups error - lp: unable to print file: client-error-not-possible
Whilst using lp or lpr to send a file (in this case /etc/services) to a printer the following error may occur.
lp: unable to print file: client-error-not-possible
Procedure to fix this problem
Ensure you are logged in as root.
Stop the cups service as follows.
service cups stop
Move any files out of the directory /var/spool/cups ensuring the sub-directory /var/spool/cups/tmp remains - for example.
mv /var/spool/cups/[c,d]* /tmp/cups-jobs
Start the cups service as follows
service cups start
Re-test the printer by sending a test print to it - for example
lp -d printer1 /etc/services