Using the 1.1.1 binaries from the argyll website: [hughsie@hughsie-work bin]$ ./printtarg -v -i CM -h -t 300 -p A4 test Paper chosen is A4 [210.0 x 297.0 mm] Patches = 210 Test patches per row = 15 Rows per page = 14, patches per page = 210 Rows in last strip = 14, patches in last row = 15 Total pages needed = 1 Worst case delta E = 17.561729 Worst case direction distinction delta E = 66.114449 Optimising layout for strip reader: 100% After optimisation, worst delta E = 89.305150 Worst case direction distinction delta E = 85.458963 Creating file 'test.tif' [hughsie@hughsie-work bin]$ ./chartread -v test Steps in each Pass = 15 Passes in each Strip = 14 Instrument Type: ColorMunki Serial Number: 2023111 Firmware version: 288 Chip ID: 01-52706812000099 Version string: 'colormunki FW V1.32 Build Nr. 1303' Calibration Ver.: 6 Production No.: 37357 Set instrument sensor to calibration position, and then hit any key to continue, or hit Esc or Q to abort: Calibration failed with 'Measurement misread' (White reference calibration didn't converge) Hit any key to retry, or Esc or Q to abort: Calibration failed with 'Measurement misread' (White reference calibration didn't converge) Hit any key to retry, or Esc or Q to abort: I can't seem to get the ColorMunki to self calibrate when using chartread, but it seems to work just fine when I'm using dispcal to calibrate the screen. Ideas welcome. Thanks. Richard.