I've this problem to, running Centos 6.9 with Samba 4.7.4. samba-tool dbcheck results in ERROR(<type 'exceptions.ValueError'>): uncaught exception - unable to parse dn string File "/usr/lib64/python2.6/site-packages/samba/netcmd/__init__.py", line 176, in _run return self.run(*args, **kwargs) File "/usr/lib64/python2.6/site-packages/samba/netcmd/dbcheck.py", line 157, in run controls=controls, attrs=attrs) File "/usr/lib64/python2.6/site-packages/samba/dbchecker.py", line 199, in check_database error_count += self.check_object(object.dn, attrs=attrs) File "/usr/lib64/python2.6/site-packages/samba/dbchecker.py", line 2038, in check_object expected_dn = ldb.Dn(self.samdb, "RDN=RDN,%s" % (parent_dn)) What can be the problem ? Cheers! Wouter