On Wed, Feb 3, 2010 at 6:55 PM, Hening Bettermann <hein.be@xxxxxx> wrote: > TIFFReadDirectory: Warning, 5D2_938_curv_exp0,5_rot_crop.tif: unknown field > with tag 34665 (0x8769) encountered. > ./scanin110: Error - 4 chanel input '5D2_938_curv_exp0,5_rot_crop.tif' must > be a CMYK tiff file My guess is that you probably have alpha transparancy in your image... So you have the RGBA channels which are four, when scanin "sees" four channels it thinks the image is CMYK, not RGB(A). So save the TIFF without alpha transparancy. Regards, Pascal de Bruijn