Hi all, In http://www.argyllcms.com/doc/ArgyllDoc.html there is mention of a CMF file format, but no examples in the tarball or documentation on the website. Looking at the code, it appears to have the same format as the spectral power examples (.sp files) but without a index or type that can be used to store different sets for XYZ. I'm wondering how to store a CMF in a portable way, as write_nxspect() seems to write a 1D array without any sample ID. I had hoped to store the CMF with the X, Y and Z data as 3 "sets" of data in the CGATS file. At the moment I'm using .csv files. Advice welcome. Thanks, Richard