Hi, I couldn't find anything in the archives about this issue. For dispread -v -yl -kTargetA DisplayA I get dispread: Error - Input file isn't a CTI1 format file So I tried a few things: With the Notepad, I created an empty DisplayA.ti1 file and, for simplicity, I placed in the same Argyll_V1.1.1\bin directory. TargetA.cal was created during dispcal and I checked on its existence in this very Argyll_V1.1.1\bin directory Many thanks in advance for your help regards nino