[Samba] samba 4.1.7 samba-tool gpo aclcheck ERROR

[Allen Chen]

I have compiled samba 4.1.7 on CentOS 6.2 32bit, and did the 
classicupgrade from Samba3 with ldap backend.
Everything is working, including GPO.
.
But this command still shows the error messages:
  /usr/local/samba/bin/samba-tool gpo aclcheck
    ERROR(<type 'exceptions.KeyError'>): uncaught exception - 'No such 
element'
   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/gpo.py", line 
1150, in run
     ds_sd_ndr = m['nTSecurityDescriptor'][0]

I googled and it exists with no solution.
Do you guys still get this error message with Samba 4.1.7?

Thanks,
Allen