package samba4 4.0.0+dfsg1-1ubuntu1 failed to install/upgrade: 子进程 已安装 post-installation 脚本 返回了错误号 255

正在设置 samba4 (4.0.0+dfsg1-1ubuntu1) ...
ERROR(ldb): uncaught exception - operations error at ../source4/dsdb/samdb/ldb_modules/rootdse.c:501
  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/dbcheck.py", line 108, in run
    fix=fix, yes=yes, quiet=quiet, in_transaction=started_transaction)
  File "/usr/lib/python2.7/dist-packages/samba/dbchecker.py", line 60, in __init__
    self.ntds_dsa = samdb.get_dsServiceName()
  File "/usr/lib/python2.7/dist-packages/samba/samdb.py", line 855, in get_dsServiceName
    res = self.search(base="", scope=ldb.SCOPE_BASE, attrs=["dsServiceName"])
dpkg: error processing samba4 (--configure):
 子进程 已安装 post-installation 脚本 返回了错误号 255
在处理时有错误发生：
 samba4
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 13.04
Package: samba4 4.0.0+dfsg1-1ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
Uname: Linux 3.8.0-19-generic i686
ApportVersion: 2.9.2-0ubuntu8
AptOrdering:
 cifs-utils: Install
 keyutils: Install
 samba4: Configure
 cifs-utils: Configure
 keyutils: Configure
Architecture: i386
Date: Sun Jul 28 16:01:07 2013
ErrorMessage: 子进程 已安装 post-installation 脚本 返回了错误号 255
InstallationDate: Installed on 2013-07-20 (7 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424)
MarkForUpload: True
SourcePackage: samba4
Title: package samba4 4.0.0+dfsg1-1ubuntu1 failed to install/upgrade: 子进程 已安装 post-installation 脚本 返回了错误号 255
UpgradeStatus: No upgrade log present (probably fresh install)