Steven Dobbelaere wrote: > Here is what I get in Argyll: Hi, the best way of diagnosing these sorts of problems is to make use of use usage (-?) and -D flags. > C:\Argyll_V1.3.4\bin>dispread -v -c 4 -y l f500 Is the i1d3 really the fourth instrument connected to your system ? What does "spotread -?" show ? You might try closing the X-Rite i1Profiler Tray, as it might be interfering. Graeme Gill.