Hello! When I do: viewgam -cc -w 1.gam -cb -w 2.gam -cm -w 3.gam -cr -w 4.gam -cy -w 5.gam Comb.wrl the result is: Unknown: Error - Error opening output file '5.gam' It's take a place when the *.gam files are write protected. If 5.gam isn't write protected, it becomes overwrote by viewgam without any message and contains now a VRML-visualization of previous 4 gamuts. The Comb.wrl isn't wrote at all. Excuse me for my English, please. Best regards, Nikolay.