[Samba] samba4 - classicupgrade - problem - passdb.error uncaught exception - Cannot load backend methods for 'ldapsam:ldap://localhost' backend NT_STATUS_CANT_ACCESS_DOMAIN_INFO

[uoL uoL]

Hello,

I'm migrating to samba4 (samba 4.0.2 in Debian 6.0.6)

After copying .tdb files and smb.conf and migrating ldap server to the new
server and configured it.

When I run:

/usr/loca/samba/bin/samba-tool domain classicpugrade --dbdir=samba
--user-xattrs=yes --realm=sadom.espel.com samba/smb.conf

I get:

Reading smb.conf
WARNING: The "idmap backend" option is deprecated
WARNING: The "idmap uid" option is deprecated
WARNING: The "idmap gid" option is deprecated
WARNING: Ignoring invalid value 'cups' for parameter 'printing'
Provisioning
convert_string_talloc: Conversion not supported.
pdb_init_ldapsam: WARNING: Could not get domain info, nor add one to the
domain. We cannot work reliably without it.
pdb backend ldapsam:ldap://localhost did not correctly init (error was
NT_STATUS_CANT_ACCESS_DOMAIN_INFO)
ERROR(<class 'passdb.error'>): uncaught exception - Cannot load backend
methods for 'ldapsam:ldap://localhost' backend
(-1073741606,NT_STATUS_CANT_ACCESS_DOMAIN_INFO)
  File
"/usr/local/samba/lib/python2.6/site-packages/samba/netcmd/__init__.py",
line 175, in _run
    return self.run(*args, **kwargs)
  File
"/usr/local/samba/lib/python2.6/site-packages/samba/netcmd/domain.py", line
1318, in run
    useeadb=eadb, dns_backend=dns_backend, use_ntvfs=use_ntvfs)
  File "/usr/local/samba/lib/python2.6/site-packages/samba/upgrade.py",
line 612, in upgrade_from_samba3
    s3db = samba3.get_sam_db()
  File
"/usr/local/samba/lib/python2.6/site-packages/samba/samba3/__init__.py",
line 390, in get_sam_db
    return passdb.PDB(self.lp.get('passdb backend'))


My smb.conf is:

[global]
unix charset = LOCALE
workgroup    = SPEL.COM
netbios name = VS002
passdb backend = ldapsam:ldap://localhost
username map = /etc/samba/smbusers
log level = 1
syslog = 0
log file = /var/log/samba/%m
max log size = 50
time server = yes
#wmarcos 24 01 08
#privileges = yes
#time offset = -30
security = user
#agregado por wmarcos 6/2/08
wins support = yes
ldap ssl = off

add user script= /usr/local/sbin/smbldap-useradd -a -m -P '%u'
delete user script = /usr/local/sbin/smbldap-userdel '%u'
add group script = /usr/local/sbin/smbldap-groupadd -p '%g'
delete group script = /usr/local/sbin/smbldap-groupdel '%g'
add user to group script = /usr/local/sbin/smbldap-groupmod -m '%u' '%g'
delete user from group script = /usr/local/sbin/smbldap-groupmod -x '%u'
'%g'
set primary group script = /usr/local/sbin/smbldap-usermod -g '%g' '%u'
add machine script = /usr/local/sbin/smbldap-useradd -i '%u'

domain logons = yes
preferred master = yes
domain master= yes
local master = yes
os level = 80
ldap suffix = dc=spel,dc=com
ldap user suffix = ou=usuarios
ldap group suffix = ou=grupos
ldap machine suffix = ou=equipos
ldap passwd sync = yes
ldap idmap suffix = ou=usuarios
ldap admin dn= cn=admin,dc=spel,dc=com
idmap backend = ldap:ldap://localhost
idmap uid = 2000~2999
idmap gid = 500~1000
printing = cups

encrypt passwords = yes
read only = yes
follow symlinks = no
guest ok = no
logon home =
logon path =
hide unreadable = yes

[homes]
comment = Directorio personal del usuario %U
valid users = %U
browseable = no
read only = no
create mask = 750
directory mask = 740

[netlogon]
path = /home/samba/netlogon
browseable = no
guest ok = yes


Any clues? I only found this, but didn't help me solve this issue

http://lists.samba.org/archive/samba-technical/2011-September/079286.html

Thanks in advance!
M.