A few weeks ago, I went to print on a roll of paper that had been calibrated and profiled weeks earlier, with many prints made successfully. One day I prepared to send the printer some files to print, and I got a message in the printer driver that "The calibration for this paper is obsolete." In the LCD window on the printer, under Paper, it said the Color Calibration Obsolete, and also, "Paper adv. calibration recommended." While I couldn't figure out why this had happened, I considered it an aberration. I recalibrated the paper, and proceeded to print successfully.
Today, with the same roll in the printer, I set up the driver to print some files, and I got the same message about "obsolete calibration." The only things that I did since the last time I printed were: 1) reprofiled the monitor, and 2) pushed the lever that releases the paper and opened the cover to look at my pinch rollers. I then closed the cover and put the lever back down.
Would either of these actions have caused the printer to see the calibration as obsolete? The printer did not forget what paper was loaded, nor did it go through the process of reloading and cutting the paper.
I would hate to think that at arbitrary intervals the printer will make me waste paper with new, unnecessary calibration.