Hi Graeme, I'm using Argyll CMS v.1.6.3 on Windows XP SP3 x86 platform to calibrate display on a notebook using i1 Pro 2 instrument. During calibration process (iteration 4) dispcal asked me to re-calibrate instrument. Here is dispcal message: Patch 73 of 96 Sample read failed because instruments need calibration Place the instrument on its reflective white reference Serial No. XXXXXXX, and then hit any key to continue, or hit Esc or Q to abort: So I placed i1 on the reference and performed the calibration and it was performed OK with "Calibration complete" message. After that I was needed to place i1 to the monitor again. I expected a pause after the calibration so I'd have a time to do it. But dispcal restarted the measurement process again immediately after the calibration (the test windows was flashing by red and green colors) and some measurements were done while re-positioning. So worst case Delta E in this reading was ~315. Is this behavior is normal, or may be better to pause dispcal until correct re-positioning of the instrument on the screen? Recently I used i1 Pro 1 (old) version and dispcal did not insist on re-calibration. Regards, Ilya Dedinsky ded -------------------------------------------------------------------------- Press RESET to continue...