Jean-Pierre Chretien wrote: > Why do you need to change the C++ sources ? That's just a template to > change, as you explained.
Yep, but the argument of the "Requirement" statement is not a LaTeX package name, but the name of a "LaTeXFeature" as defined by LyX. Only those features that are handled in the file src/LaTeXFeatures.C are valid. Some of them are simply LaTeX packages (like "float"), but others are more complicated (like "color"). "xcolor" is not among those known features. For details see the source code. Georg
