I bought my monitor in August 2014. It's marked REV. 07 from May 2014.
Yesterday (Feb. 16, 2015), when I tried to calibrate the monitor, I got the error saying to connect the monitor USB cable to the computer. Of course it's already connected and has worked perfectly in the past.
I've tried the various "fixes" listed on the forums, but nothing works.
I'm not happy at all. I need to be able to calibrate the monitor because I use it for photography and graphics.