S. wrote: > This took quite some effort because very often communication problems occured > with the DTP20 (seems to be some initialisation issue: either it works > perfectly or it will only give communication errors after connecting the > device) but finally I did succeed. Hi, What sort of system are you using ? What sort of reports do you get at the point of failure using "-D6" ? > If I then try to create an icc profile from the results using > * colprof -v -qh -i D50 -o 1931_2 -S AdobeRGB1998.icc -cmt -dpp Canon > > I get the following error: > colprof: Error - gamut: vector_isect failed! The typical explanation in the past for this sort of error is that the gamut of the device has collapsed in some way, and doesn't have a reasonable volume. But without your .ti3 file I can't really tell. Create a profile without -S and view it using iccgamut. Does it look normal ? Graeme Gill.