[Samba] join as DC fails on Ubuntu 14.04

[steve]

Hi
Attempt to join 4.1.8 to a 4.1.8 domain:

/usr/local/samba/bin/samba-tool domain join DC -UAdministrator
--realm=ALTEA.SITE --dns-backend=BIND9_DLZ
ERROR(runtime): uncaught exception - Connection to SAMR pipe of PDC for
DC failed: Connection to DC failed: NT_STATUS_OBJECT_NAME_NOT_FOUND
  File
"/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/__init__.py",
line 175, in _run
    return self.run(*args, **kwargs)
  File
"/usr/local/samba/lib/python2.7/site-packages/samba/netcmd/domain.py",
line 602, in run
    machinepass=machinepass)


Any quick fix before we dig?
Thanks,
Steve