[Samba] Samba 4.1.17 classic update w/LDAP - parsing error

[Mgr. Peter Tuharsky]

Hallo,

I'm trying Samba 4.1.17 (Debian Jessie packages) classic update process
with previous LDAP backend. The process goes normal, occasional "group
already exists" etc.

But it ends up with an error:

ERROR(<type 'exceptions.ValueError'>): uncaught exception - unable to
parse dn string
  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/domain.py", line
1321, in run
    useeadb=eadb, dns_backend=dns_backend, use_ntvfs=use_ntvfs)
  File "/usr/lib/python2.7/dist-packages/samba/upgrade.py", line 903, in
upgrade_from_samba3
    add_group_from_mapping_entry(result.samdb, g, logger)
  File "/usr/lib/python2.7/dist-packages/samba/upgrade.py", line 274, in
add_group_from_mapping_entry
    m.dn = ldb.Dn(samdb, "CN=%s,CN=Users,%s" % (groupmap.nt_name,
samdb.get_default_basedn()))


Does someone have a clue, please?