package libnunit2.6-cil 2.6.0.12051+dfsg-2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 29

[Gavin Clark]

Cannot load Manager Accounting package

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: libnunit2.6-cil 2.6.0.12051+dfsg-2
ProcVersionSignature: Ubuntu 3.13.0-53.89-generic 3.13.11-ckt19
Uname: Linux 3.13.0-53-generic i686
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: i386
Date: Mon Jun 1 20:04:24 2015
DuplicateSignature: package:libnunit2.6-cil:2.6.0.12051+dfsg-2:subprocess installed post-installation script returned error exit status 29
ErrorMessage: subprocess installed post-installation script returned error exit status 29
InstallationDate: Installed on 2014-05-10 (387 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release i386 (20140417)
PackageArchitecture: all
SourcePackage: nunit
Title: package libnunit2.6-cil 2.6.0.12051+dfsg-2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 29
UpgradeStatus: No upgrade log present (probably fresh install)