I have an Epson C40UX printer which was working fine, then something happened (I think it got disconnected while printing) and, after that, I started getting "Communication Error" and nothing would print.

I removed the Epson folder from Printers and deleted the printer from the print center, then downloaded the driver from the Epson website and installed it. Now, the printer doesn't appear in the Print Center and there is nothing to add.