Installer fails, can't add CD-ROM to apt though using USB

[Arnel A. Borja]

Installer fails saying that it can't add the CD-ROM to apt (I'm using a USB anyway).

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: ubiquity 2.8.7
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic i686
ApportVersion: 1.23-0ubuntu3
Architecture: i386
CasperVersion: 1.287
Date: Fri Dec 23 08:28:49 2011
LiveMediaBuild: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcEnviron:
 LANGUAGE=en_PH.UTF-8
 PATH=(custom, no user)
 LANG=en_PH.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Dec 23 08:28:41 ubuntu plugininstall.py: Traceback (most recent call last):
Dec 23 08:28:41 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 1641, in <module>
Dec 23 08:28:41 ubuntu plugininstall.py: install.run()
Dec 23 08:28:41 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 55, in wrapper
Dec 23 08:28:41 ubuntu plugininstall.py: func(self)
Dec 23 08:28:41 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 158, in run
Dec 23 08:28:41 ubuntu plugininstall.py: self.configure_apt()
Dec 23 08:28:41 ubuntu plugininstall.py: File "/usr/share/ubiquity/plugininstall.py", line 580, in configure_apt
Dec 23 08:28:41 ubuntu plugininstall.py: raise install_misc.InstallStepError("AptSetup failed with code %d" % ret)
Dec 23 08:28:41 ubuntu plugininstall.py: InstallStepError: AptSetup failed with code 141
Dec 23 08:28:41 ubuntu plugininstall.py:

[dino99 (9d9)]

This version has expired for some time