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

[David Gray]

ERROR: Invalid smb.conf
/var/lib/dpkg/info/samba4.postinst: 14: /var/lib/dpkg/info/samba4.postinst: /usr/share/samba/setoption.pl: Permission denied
dpkg: error processing samba4 (--configure):
 subprocess installed post-installation script returned error exit status 126
Processing triggers for libc-bin ...
ldconfig deferred processing now taking place
Errors were encountered while processing:
 samba4
E: Sub-process /usr/bin/dpkg returned an error code (1)
dave@ubuntu:~$

ubuntu 12.04LTS
memory 7.7 GiB
intel core i5-2500K CPU 3.3GHz X 4

Installation via terminal sudo get-get install samba4

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: samba4 4.0.0~alpha18.dfsg1-4ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-31.50-generic 3.2.28
Uname: Linux 3.2.0-31-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
Date: Sun Sep 23 15:23:44 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 126
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 2012-06-08 (106 days ago)