package samba4 4.0.0~alpha18.dfsg1-4ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Dave Barker]

did an apt-get install samba
then realized I should have done a apt-get install samba samba-common
So I did : apt-get install samba samba-common.

after rebooting:
 A pop-up appeared saying there was an issue with installing samba

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: samba4 4.0.0~alpha18.dfsg1-4ubuntu2
ProcVersionSignature: Ubuntu 3.5.0-27.46~precise1-generic 3.5.7.7
Uname: Linux 3.5.0-27-generic i686
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: i386
Date: Tue Apr 16 09:12:24 2013
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
MarkForUpload: True
SourcePackage: samba4
Title: package samba4 4.0.0~alpha18.dfsg1-4ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)