package zentyal-firewall (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 2

[NMRC_Genomics]

Trying to remove the application

ProblemType: Package
DistroRelease: Ubuntu 13.04
Package: zentyal-firewall (not installed)
ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
Uname: Linux 3.8.0-26-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
Date: Thu Jul 11 20:01:50 2013
DuplicateSignature: package:zentyal-firewall:(not installed):subprocess installed post-removal script returned error exit status 2
ErrorMessage: subprocess installed post-removal script returned error exit status 2
InstallationDate: Installed on 2013-04-29 (73 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
SourcePackage: zentyal-firewall
Title: package zentyal-firewall (not installed) failed to install/upgrade: subprocess installed post-removal script returned error exit status 2
UpgradeStatus: No upgrade log present (probably fresh install)