Megaco and controlling processes

In the Megaco example, it is recommended to started the simple_mgc by
doing:

% erl -s megaco
1> megaco_simple_mgc:start ().

Indeed, doing:
% erl -s megaco -s megaco_simple_mgc

does not work. The MGC gives:

** Reason for termination == 
** {badarg,[{ets,update_counter,
                 [megaco_udp_stats,
                  {{send_handle,#Port<0.68>,{127,0,0,1},3877},
                   medGwyGatewayNumInMessages},
                  1]},
            {megaco_udp_server,incCounter,2},
            {megaco_udp_server,handle_info,2},
            {gen_server,handle_msg,6},
            {proc_lib,init_p,5}]}

which is right, the megaco_udp_stats table does not show up in ets:i().

I couldn't find in the Megaco 2.0 documentation a place where it says
which processes have to be alive.

Could anyone explain whether this is a bug, or which function must be
called by a process which stays alive?

Thanks in advance.

  Sam
-- 
Samuel Tardieu -- sam@xxxxxxxxxxx -- http://www.rfc1149.net/sam