Sometimes, some includes are missing. Please find enclose a test where you can find that the classes Materiau and Point depends on Nombre. The problem is "#include "Nombre.hpp"" in only include on Point.hpp.
LE GARREC Vincent
The enclosed patch solves this problem. I have to be honest, I'm not sure this patch is the right thing to do but that's works for me.
Thanks for providing this patch. I applied it on git master in commit c025503
This was integrated in dia2code-0.8.6.