It's because the GRACoL data set isn't spectral and isn't CXF data......the GRACoL data set is L*a*b* measurements. iProfiler is just letting you know that. It will likely do this with ANY legacy data sets but it's nothing to really worry about. Only thing is, since the data is not spectral, I don't believe you'll be able to do anything in the "Lighting" asset which is really no big deal if you're building profiles for the graphic arts (standard lighting conditions).
Regards,
Terry
Terence Wyse, WyseConsul
Color Management Consulting, G7 Certified Expert