12.04 Alternative CD upgrade fails with "Failed to fetch cdrom"

[zenga11]

Running in the shell with the alternative CD:

dirk@mt-lincoln:~$ gksu "sh /media/'Ubuntu 12.04 LTS i386'/cdromupgrade"

(gksu:2209): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
authenticate 'precise.tar.gz' against 'precise.tar.gz.gpg'
extracting 'precise.tar.gz'
WARNING: Failed to read mirror file

(precise:2215): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",
gpgv: Signature made Mon 23 Apr 2012 03:03:22 PM MDT using DSA key ID FBB75451
gpgv: Good signature from "Ubuntu CD Image Automatic Signing Key <email address hidden>"
dirk@mt-lincoln:~$

The dialog reports the error:

Failed to fetch cdrom:[Ubuntu 12.04 LTS _Precise Pangolin_ - Release i386 (20120423)]/pool/main/p/patch/patch_2.6.1-3_i386.deb Wrong CD-ROM

I tried with both not updating packages from the Internet and then trying it again allowing the packages to the updated. Failed with the same error.

[zenga11 (dh-biztechwiz)]

I forgot this info:
$ lsb_release -rd
Description: Ubuntu 11.10
Release: 11.10

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/991522/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[zenga11 (dh-biztechwiz)]

Added package.

[zenga11 (dh-biztechwiz)]

Here is a ZIP file contain the log files from /var/log/dist-upgrade/20120429-1455

[Xiaoguang Qiao (qxg)]

Removing ubuntu-12.04-desktop-i386.iso from Sources solved the problem for me.