Hi Graeme, doing some preliminary tests (1.3.2), I found a couple of anomalies. First, with my system the following command locks permanently until I press CTRL-C: D:\>D:\Argyll_V1.3.2\bin\targen.exe -v -d 4 -g 10 -f 1000 -l 300 test CMYK test chart Compostie Grey steps = 10 Full spread patches = 1000 Ink limit = 300.0% (underlying 300.0%) Adaptation weights: Device = 0.935, Perceptual = 0.065, Curvature = 0.010 Perceptual cache resolution = 7 Acceleration grid res = 6 There are 10 unique fixed points to add (13 non-unique) There are 987 far spread points to add Added 980/997[]<-cursor jumping here when stalling Without now discussing the choiche of arguments, it looks it's the combination of -g with -f options causing the stall. Removing -g or -f and using other arguments, the commands runs fine till the end. The computer is a PIV dual core 3.2 Ghz, 2GB ram, Windows XP. The task manager shows the targen command running with 50% CPU usage. Second. Is it an intended behaviour that printtarg always generates testcharts with horizontal orientation ? Usually one may prefer a vertical orientation instead, since most of times the paper used is higher than wider, and I have to rotate it 90 degree clockwise every time. thanks for support /&