John Thompson wrote: Hi, > Loaded Argyll_V1.6.3 > Windows 7 64bit system > Monitor calibration went without a hitch. > Having trouble measuring charts with Colormunki. Were you using the ColorMunki for the display profiling ? > Will read OK until misread, then retry fails with "communication problem" > error. > Strip read filed due to unexpected error: Hardware Failure, Rea a number of > bytes not a multiple of 274. That seems like a HW problem of some sort. If you are able to, try: * A different USB port/hub * A different USB lead * A different computer If none of that helps, please email _me_ with the log output with -D7, i.e. chartread -D7 ..other options, files.. 2> log.txt Graeme Gill.