> All the files from "REGLEMENTATION DE LA CIRCULATION
> AERIENNE [RCA]" are missing.

Looking at the code on the main section, I see:
< select name='ordre_0' class='titre3'>
< option value='0' selected>Tous documents< /option>< option
value='1'>REGLEMENTATION DE LA CIRCULATION AERIENNE< /option>< option
value='2'>GUIDE VFR< /option>...

Those are not links, that is a form. httrack does not click on forms. Thus RCA
is missing.