I found the workaround for the -fM2 in a freelist thread: manually fixing the instrument name in the ti3 file. On Sun, Jul 20, 2014 at 9:21 PM, János, Tóth F. <janos666@xxxxxxxxxx> wrote: > Is there an undocumented chartread command line parameter or an > enviroment variable which forces the i1Pro2 to use it's white LED > alone to act like a device with an U.V. filter? (Is this even > possible?) > > I understand it's not the best way to handle the FWA problem but I > want to compare the results of a ColorMunki Photo and an i1 Pro2. And > the CM is LED-only U.V. cut... > > I tried -fM2 but chartread said it's not supported with the i1Pro2. > What am I missing?