package tomcat6 6.0.28-10ubuntu2.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Rajat Pandita]

Installation fails with error code
rajat@Rajat-Shreya:~$ sudo apt-get install tomcat6
Reading package lists... Done
Building dependency tree
Reading state information... Done
tomcat6 is already the newest version.
The following package was automatically installed and is no longer required:
  nspluginwrapper
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]? y
Setting up tomcat6 (6.0.28-10ubuntu2.3) ...
chmod: cannot access `/etc/tomcat6/tomcat-users.xml': No such file or directory
dpkg: error processing tomcat6 (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 tomcat6
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: tomcat6 6.0.28-10ubuntu2.3
ProcVersionSignature: Ubuntu 2.6.38-13.56-generic 2.6.38.8
Uname: Linux 2.6.38-13-generic x86_64
NonfreeKernelModules: fglrx
AptOrdering:
 tomcat6: Install
 tomcat6: Configure
Architecture: amd64
Date: Sat Mar 17 13:39:26 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Zorin OS 5.2 64bit - Release amd64
PackageArchitecture: all
SourcePackage: tomcat6
Title: package tomcat6 6.0.28-10ubuntu2.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[James Page (james-page)]

Error from log:

Unpacking tomcat6 (from .../tomcat6_6.0.28-10ubuntu2.3_all.deb) ...
Processing triggers for ureadahead ...
Setting up tomcat6 (6.0.28-10ubuntu2.3) ...
chmod: cannot access `/etc/tomcat6/tomcat-users.xml': No such file or directory
dpkg: error processing tomcat6 (--configure):
 subprocess installed post-installation script returned error exit status 1

[dino99 (9d9)]

This version is no more supported and is not a 'security' problem; so does not expect a backport