Nick Hall wrote: > Thanks for responding. I just checked and it indeed works fine with the > manufacturers software. I > also tried reloading the PLD pattern from the CD using spyd2en. The same > errors happens then when > using dispcal. I've also tried loading the PLD pattern from the latest > download of Colorvision's > software (version 2.3.6) and I also get the same error. Well it's a puzzle, but It's unlikely that there is going to be a definitive explanation about it, so I'll change the errors to debug warnings. MSWin executable snapshot is here: <http://www.argyllcms.com/disptools.win32.zip> if you want to try it out. Graeme Gill.