package duplicity 0.6.18-0ubuntu3.5 failed to install/upgrade: subprocess installed post-installation script returned error exit status 101

I have done 'sudo apt-get remove --purge duplicity'. If the problem occurs again I will submit a new report.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: duplicity 0.6.18-0ubuntu3.5
ProcVersionSignature: Ubuntu 3.2.0-60.91-generic 3.2.55
Uname: Linux 3.2.0-60-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.6
AptOrdering:
 gparted: Install
 duplicity: Configure
 deja-dup: Configure
 gparted: Configure
Architecture: amd64
Date: Wed Apr 23 23:04:33 2014
DuplicateSignature: package:duplicity:0.6.18-0ubuntu3.5:subprocess installed post-installation script returned error exit status 101
ErrorMessage: subprocess installed post-installation script returned error exit status 101
InstallationMedia: Ubuntu 10.04.4 LTS "Lucid Lynx" - Release amd64 (20120214.2)
MarkForUpload: True
SourcePackage: duplicity
Title: package duplicity 0.6.18-0ubuntu3.5 failed to install/upgrade: subprocess installed post-installation script returned error exit status 101
UpgradeStatus: No upgrade log present (probably fresh install)