package samba4 (not installed) failed to install/upgrade: subprocess installed post-installation script returned error exit status 126

[yoeloosh]

unable to upgrade samba4

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: samba4 (not installed)
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
Uname: Linux 3.2.0-23-generic x86_64
ApportVersion: 2.0.1-0ubuntu5
AptOrdering: samba4: Configure
Architecture: amd64
Date: Thu Apr 26 17:24:36 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 126
InstallationMedia: Ubuntu 10.04.4 LTS "Lucid Lynx" - Release amd64 (20120214.2)
SourcePackage: samba4
Title: package samba4 (not installed) failed to install/upgrade: subprocess installed post-installation script returned error exit status 126
UpgradeStatus: No upgrade log present (probably fresh install)