Yosemite printer panasonic DP C265 not print. Says: "Stopped - 'Filter' failed"
It IS being sandboxed. One solution is to disable sandboxing:


  Edit /etc/cups/cups-files.conf and add this line: "Sandboxing Off",
  restart cups: "sudo launchctl stop org.cups.cupsd"


However, another user has written a script which identifies those printer descriptions which need explicit path/to/file information, and automagically adds it. 

I have used this script to allow me to print to my HP 5850 from Yosemite. My other printers (modern drivers) were not affected.

This solution is not mine. I found this answer through others' answers here  (https://discussions.apple.com/message/26887951#26887951). Good luck!