Thanks, Mark, for your response. I'm jealous! I am on a MAC, Yosemite, and the same EPSON SC-P600 Series (IP) driver, which I just reinstalled one more time. I've tried different rendering intents too. Nozzle check is perfect. I'm going to try reinstalling the driver one more time. I'm also waiting for the next level of Epson support to get back to me.
Leslie
It seems like you are using the identical setup as I am, i.e, Mac, Yosemite, P600 Series (IP) driver, and printing from PSCC as I am, so it is a strange problem indeed. That said, you may just want to double check in printer/scanners preferences that your Mac is truly calling the Series (IP) driver. Come to think of it, my very first print had totally whacked out color because after I followed the Epson installation procedure by the book the first time, it loaded three drivers (airprint, a direct USB connect, and the Wifi EPSON SC-P600 Series (IP) driver), but it set the system default to the AirPrint driver. I have no clue why it did that, and I believe Keith Cooper at Norhlight Images reported the same issue, but the fix was just to delete the airprint driver and manually load the EPSON SC-P600 Series (IP) driver.
Do you have access to the Xrite TC918 color target (it's a free download as part of the Profilemaker 5 package on the Xrite site). What I like about this older profiling target is that it isn't a scrambled pattern. It has a very recognizable color array which one can learn to visually "read" by eye to determine if a "no color adjust" condition has been correctly achieved. If you print it with Adobe Color Printer Utility and post a picture of the result, i can pretty much tell you just by looking at the result whether the no color adjust pathway and your printer is working right.
cheers,
Mark
http://www.aardenburg-imaging.com