I've getting a "filter error" on the printer...i've been getting the same think on my Epson CX5800F since a recent apple update
Think I just found the answer...seem lots of folks are having the same issue...
1. Go to the Apple Menu
2. Select System Preferences
3. Open Sharing
4. Enter any name on the computer name field; eg My iMac. Close the page once done
5. Restart the computer. You should be able to print now.
Just tested and both printers seem to be working fine. Mike Frazier, Digital Media Services, LLC