Hi Pilou, just to make sure your question is answered:

re:
> What is the last line NumPts? Seems there are not the Numbers of Profils' Pts (become 3 for the "star") seems not the number of sections --- ???

That would only have an effect if the Profiles option is set to NumPoints mode. There is some information in the help file about the profiles option in the Loft command reference here:
http://moi3d.com/3.0/docs/moi_command_reference7.htm#loft

- Michael