I am using Ubuntu 10.04. CUPS-PDF works great. However I wanted to change the output filename. So I followed those steps as described in http://www.debianadmin.com/howto-ins...in-debian.html

However, I found the post processing script file, cups-pdf-renamer, never runs. It runs when I run it manually from command line. I struggled to fix it by myself for a few hours. I could not find anything helpful. I also found errors in CUPS log file, /var/log/cups/error_log.

E [04/Apr/2013:19:58:58 +0900] Unknown directive SystemGroup on line 3 of /etc/cups/cupsd.conf.
E [04/Apr/2013:19:58:58 +0900] Unable to remove temporary file "/var/spool/cups/tmp/.hplip" - Is a directory