hi ,
the RPC function number in each interface is limited by 9 , I have more
than 9 functions . Genode  have away to do that by  manually constructing
the type list of RPC functions instead of using the convenience macro
 typedef Meta::Type_tuple<Rpc_myfunc1,
         Meta::Type_tuple<Rpc_myfunc2,
                          Meta::Empty> >
         Rpc_functions;

I  add that to my intrface session but i get the next error
 error: ‘Meta’ does not name a type
and another error 
 no type named ‘Rpc_functions’ in ‘struct myrpcsession::Session’
I looked to the "cpu_session.h" and tried to do same but i think i miss some thing . 
any clue?
best ,