[Samba] Samba4 Join a domain as a DC

[zorg]

Hi
I m trying to join an ad as a dc

following this
https://wiki.samba.org/index.php/Check_and_fix_DNS_entries_on_DC_joins

But i  do
samba-tool dns add EPSILUM _msdcs.myos.local 
d4aBdfb0-8937-465a-af2d-d657fgh145ee CNAME smb4.myos.local
If have got
  ERROR(runtime): uncaught exception - (9601, 
'WERR_DNS_ERROR_ZONE_DOES_NOT_EXIST')
‎ File "/usr/lib/python2.7/dist-packages/samba/netcmd/__init__.py", line 
175, in _run
‎ return self.run(*args, **kwargs)
‎ File "/usr/lib/python2.7/dist-packages/samba/netcmd/dns.py", line 
1070, in run
‎0, server, zone, name, add_rec_buf, None)


I have seen other people asking about this but noone explains what to do 
to solve this

Hope someone can help

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