package samba4 4.0.0~alpha18.dfsg1-4ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 126

[Roger DeVillez]

during update process

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: samba4 4.0.0~alpha18.dfsg1-4ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu12
Architecture: amd64
Date: Mon Sep 3 10:40:24 2012
DpkgHistoryLog:
 Start-Date: 2012-09-03 10:39:51
 Commandline: aptdaemon role='role-commit-packages' sender=':1.95'
 Upgrade: icedtea-netx:amd64 (1.2-2ubuntu1.1, 1.2-2ubuntu1.2), thunderbird:amd64 (14.0+build1-0ubuntu0.12.04.1, 15.0+build1-0ubuntu0.12.04.1), icedtea-netx-common:amd64 (1.2-2ubuntu1.1, 1.2-2ubuntu1.2), icedtea-6-plugin:amd64 (1.2-2ubuntu1.1, 1.2-2ubuntu1.2), google-chrome-stable:amd64 (21.0.1180.81-r151980, 21.0.1180.89-r154005), python-gst0.10:amd64 (0.10.22-3, 0.10.22-3ubuntu0.1), thunderbird-globalmenu:amd64 (14.0+build1-0ubuntu0.12.04.1, 15.0+build1-0ubuntu0.12.04.1), thunderbird-gnome-support:amd64 (14.0+build1-0ubuntu0.12.04.1, 15.0+build1-0ubuntu0.12.04.1), openssl:amd64 (1.0.1-4ubuntu5.3, 1.0.1-4ubuntu5.5), icedtea6-plugin:amd64 (6b21.2-2ubuntu1.1, 6b21.2-2ubuntu1.2), libssl1.0.0:amd64 (1.0.1-4ubuntu5.3, 1.0.1-4ubuntu5.5)
ErrorMessage: subprocess installed post-installation script returned error exit status 126
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
SourcePackage: samba4
Title: package samba4 4.0.0~alpha18.dfsg1-4ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 126
UpgradeStatus: Upgraded to precise on 2012-08-28 (5 days ago)