installation failed

[JPaul]

Message during installation : you can type apt-get update

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: ubiquity 2.10.20
ProcVersionSignature: Ubuntu 3.2.0-23.31-lowlatency-pae 3.2.14
Uname: Linux 3.2.0-23-lowlatency-pae i686
ApportVersion: 2.0.1-0ubuntu12
Architecture: i386
CasperVersion: 1.315
Date: Tue Oct 2 01:55:40 2012
InstallCmdLine: file=/cdrom/preseed/ubuntustudio.seed boot=casper only-ubiquity initrd=/casper/initrd.lz quiet splash -- debian-installer/language=fr keyboard-configuration/layoutcode?=fr keyboard-configuration/variantcode?=oss
LiveMediaBuild: Ubuntu-Studio 12.04.1 "Precise Pangolin" - Release i386 (20120818)
ProcEnviron:
 LANGUAGE=fr_FR.UTF-8
 TERM=linux
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Dimitri John Ledkov (xnox)]

Oct 1 23:55:03 ubuntu-studio plugininstall.py: Exception during installation:
Oct 1 23:55:03 ubuntu-studio plugininstall.py: Traceback (most recent call last):
Oct 1 23:55:03 ubuntu-studio plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 285, in pulse
Oct 1 23:55:03 ubuntu-studio plugininstall.py: self.db.subst(self.info, 'TIME', time_str)
Oct 1 23:55:03 ubuntu-studio plugininstall.py: AttributeError: 'DebconfAcquireProgress' object has no attribute 'db'
Oct 1 23:55:03 ubuntu-studio plugininstall.py:

[Ubuntu Foundations Team Bug Bot (crichton)]

Exception during installation:
Oct 1 23:55:03 ubuntu-studio plugininstall.py: Traceback (most recent call last):
Oct 1 23:55:03 ubuntu-studio plugininstall.py: File "/usr/lib/ubiquity/ubiquity/install_misc.py", line 285, in pulse
Oct 1 23:55:03 ubuntu-studio plugininstall.py: self.db.subst(self.info, 'TIME', time_str)
Oct 1 23:55:03 ubuntu-studio plugininstall.py: AttributeError: 'DebconfAcquireProgress' object has no attribute 'db'
Oct 1 23:55:03 ubuntu-studio plugininstall.py: