Hi, Graeme! There is Windows Vista 32b, and v1.1.1 binaries from argyllcms.com. When I do a mistake and give to the iccgamut the -dpp key (incorrect) in place of -cpp (correct), the iccgamut says nothing, ignores the resolution key (-d3), but applies the output space key (-pj) and do the computing: iccgamut -v -d3 -pj -w -dpp vcah91cie.icm The resulted volume value, *.gam and *.wrl files are the same as without -d3 key. I think the iccgamut should warn about incorrect key -dpp, because I've spent some time in guessing what is wrong. Is this because the program interprets the -dpp as -d key with "pp" value?