Mike Rozier wrote: > dispwin_set_ramdac failed on SetDeviceGammaRamp() with error 87 > I know 20cdm is very low. Trying to effectively be able to soft proof the > dynamic range (level of detail and contrast) of a print, within HDR > software, so I don't have to keep soft proofing in PhotoShop, and either > make adjustments in PS or keep going back into HDR software until > satisfactory. (I know color will be less accurate at this low brightness.) Hi, sorry, there is nothing much I can do about this, since it is a sanity check applied by the MSWin operating system. Suggestions to work around this: Use a different platform. OS X and Linux don't have this sanity check. If you are using a full screen application, then use applycal to incorporate the calibration into the display profile, and load a linear calibration curve. <http://www.argyllcms.com/doc/applycal.html> Graeme Gill.