That's an error from your printer driver, not the application.
Something is unhappy with the printer or the printer driver.
Not so. That is inevitably the instant answer. The actuall problem seems rooted in the Adobe/Epson interface that causes that useless message. The printer "communicates" very will w/ every other program and two other machines. It also began sort of gradually over two days. Intermittent. As mentioned, drivers are reloaded now almost 2 dozen times.
Oh, by the way, Epson says it is an Adobe application problem. The usuall issue users have that no party wants to "own" a problem.
I have used 4 cables and changed the USB location also. No change. Still prints from anything but Adobe apps.
I'm afraid that it is so.
There is no Adobe/Epson interface. The application talks to the OS, and the OS talks to the printer driver, and the printer driver talks to the hardware through OS APIs.
A communication error could only come from the driver software talking to the hardware, or a low level OS routine talking to the hardware.
(ok, it could also theoretically come from other parts of the driver returning a bogus error code)
I'm sorry you got bad information from Epson support - but you need to contact them, give them the symptoms and have them work with you to troubleshoot your printer connection and driver setup. A recent and degrading problem like this could indicate a bad cable, bad connector, a bad printer, or just a bug in the driver software.
But if it were a bug in Photoshop, it would happen with all printers, all the time. And that simply is not the case.
Oh, and Photoshop doesn't share much code with Lightroom - so it's even more unlikely to be something in the applications.
Sir, I just saw this when I updated a reply. I do not know how this forum functions obviously. The addition to my update was made before I saw your earlier reply onscreen. Thank you for the reply. The frustration quotient is very high w/ this thing. The driver is actually a couple years old and has functioned so far even w/ CS5 for a long time. The only thing different now is my newly attempted LR printing. I am in a hard place to get w/ Epson very well, but, will try. As an aside here I do want to get LR4 upgrade. Do you know if the Epson plugin for CS5 will function in LR4 if I place it in the plugin folder? Thank you for your replys, if I can see how to get them in real time. Richard
No, Lightroom doesn't support Photoshop plugins.
Since the driver has been working for a while, it could be an OS update that has caused the problem, or some failure in the hardware side of things (first: try another cable :-).