Hi, When ever i install or remove any software, i see following errors. Was upgraded ubuntu from 10.10 to 11.04 recently and seeing this error after upgrading. Please any one help me in resolving this error. Thanks in advance. pkaX@pkax-ThinkPad-R400:~$ sudo apt-get install usermod [sudo] password for pkaX: Reading package lists... Done Building dependency tree Reading state information... Done Suggested packages: transmission-daemon transmission-gtk The following NEW packages will be installed: transmission-cli 0 upgraded, 1 newly installed, 0 to remove and 81 not upgraded. 3 not fully installed or removed. Need to get 924 kB of archives. After this operation, 1,946 kB of additional disk space will be used. Get:1 <a href="http://us.archive.ubuntu.com/ubuntu/">http://us.archive.ubuntu.com/ubuntu/</a> natty/universe transmission-cli i386 2.13-0ubuntu8 [924 kB] Fetched 924 kB in 12s (76.3 kB/s) Selecting previously deselected package transmission-cli. (Reading database ... 237703 files and directories currently installed.) Unpacking transmission-cli (from .../transmission-cli_2.13-0ubuntu8_i386.deb) ... Processing triggers for man-db ... Setting up samba4 (4.0.0~alpha15~git20110124.dfsg1-2ubuntu1) ... Unknown parameter encountered: "max log size" Ignoring unknown parameter "max log size" Unknown parameter encountered: "syslog" Ignoring unknown parameter "syslog" Unknown parameter encountered: "passdb backend" Ignoring unknown parameter "passdb backend" Unknown parameter encountered: "unix password sync" Ignoring unknown parameter "unix password sync" Unknown parameter encountered: "passwd program" Ignoring unknown parameter "passwd program" Unknown parameter encountered: "pam password change" Ignoring unknown parameter "pam password change" Unknown parameter encountered: "map to guest" Ignoring unknown parameter "map to guest" Unknown parameter encountered: "usershare allow guests" Ignoring unknown parameter "usershare allow guests" Unknown parameter encountered: "guest ok" Ignoring unknown parameter "guest ok" Unknown parameter encountered: "guest ok" Ignoring unknown parameter "guest ok" Unknown parameter encountered: "max log size" Ignoring unknown parameter "max log size" Unknown parameter encountered: "syslog" Ignoring unknown parameter "syslog" Unknown parameter encountered: "passdb backend" Ignoring unknown parameter "passdb backend" Unknown parameter encountered: "unix password sync" Ignoring unknown parameter "unix password sync" Unknown parameter encountered: "passwd program" Ignoring unknown parameter "passwd program" Unknown parameter encountered: "pam password change" Ignoring unknown parameter "pam password change" Unknown parameter encountered: "map to guest" Ignoring unknown parameter "map to guest" Unknown parameter encountered: "usershare allow guests" Ignoring unknown parameter "usershare allow guests" Unknown parameter encountered: "guest ok" Ignoring unknown parameter "guest ok" Unknown parameter encountered: "guest ok" Ignoring unknown parameter "guest ok" WARNING: Module [samba_dsdb] not found - do you need to set LDB_MODULES_PATH? Unable to load modules for /var/lib/samba/private/sam.ldb: (null) Traceback (most recent call last): File "/usr/share/samba/setup/upgradeprovision", line 1597, in <module> ldbs = get_ldbs(paths, creds, session, lp) File "/usr/lib/python2.7/dist-packages/samba/upgradehelpers.py", line 159, in get_ldbs ldbs.sam = SamDB(paths.samdb, session_info=session, credentials=creds, lp=lp, options=["modules:samba_dsdb"]) File "/usr/lib/python2.7/dist-packages/samba/samdb.py", line 53, in __init__ options=options) File "/usr/lib/python2.7/dist-packages/samba/__init__.py", line 110, in __init__ self.connect(url, flags, options) File "/usr/lib/python2.7/dist-packages/samba/samdb.py", line 66, in connect options=options) _ldb.LdbError: (80, None) dpkg: error processing samba4 (--configure): subprocess installed post-installation script returned error exit status 1 dpkg: dependency problems prevent configuration of openchangeserver: openchangeserver depends on samba4 (>= 4.0.0~); however: Package samba4 is not configured yet. dpkg: error processing openchangeserver (--configure): dependency problems - leaving unconfigured dpkg: dependency problems prevent configuration of openchangeserver-dev: openchangeserver-dev depends on openchangeserver (= 1:0.11~bzr1932-1build1); however: Package openchangeserver is not configured yet. dpkg: error processing openchangeserver-dev (--configure): dependency problems - leaving unconfigured Setting up transmission-cli (2.13-0ubuntu8) ... No apport report written because the error message indicates its a followup error from a previous failure. No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: samba4 openchangeserver openchangeserver-dev E: Sub-process /usr/bin/dpkg returned an error code (1) -- Regards, Prasanna :-)