Well, rather than starting a whole new thread, this problem has risen again. I can print roll paper just fine, but as soon as I try to print a sheet I get that dreaded "Filter" failed error. I've spent hours on the phone with Epson and Apple - and they've NEVER HEARD OF IT - and of course blame the other. I'm connected (Epson 9900) via USB, check the USB, deleted and reinstalled the driver umpteen times, trashed, repaired permissions, restarted, everything I can think of and nothing.
Could it be that my computer is simply too old for all the newer software and drivers? It's a MacPro (Early 2008) but running the latest OS X. I just don't know what else it could be and very frustrated.