Could not calculate the upgrade: Resolve generated breaks, this may be caused by held packages

[Richard Wooding]

When attempting to do an upgrade this morning:

"Could not calculate the upgrade

A unresolvable problem occurred while calculating the upgrade.

Please report this bug against the 'update-manager' package and include the following error message:
'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'"

The error message is repeatable by clicking "Check" in update manager.

Please get back to me if I need to provide log files or other information.

[Kjell Braden (afflux)]

Thanks for your report. Can you please provide the output of the following command:

sudo apt-get dist-upgrade -o "Debug::pkgProblemResolver=1"

Thanks

[Richard Wooding (m-launchpad-richardwooding-com)]

I have attached the output of the command

sudo apt-get dist-upgrade -o "Debug::pkgProblemResolver=1"

Could it be because I did this at an earlier stage:

I was trying out schooltool and added the following to /etc/apt/sources.lst

deb http://ppa.launchpad.net/schooltool-owners/ubuntu hardy main
deb-src http://ppa.launchpad.net/schooltool-owners/ubuntu hardy main

I then installed schooltool in this way:

sudo apt-get install schooltool-2008

Which was when I saw zope packages installed. If I uninstall schooltool (which I no longer need) and it's dependencies, and remove the repository will it solve the problem?

[Kjell Braden (afflux)]

Yes, this is indeed the case. I've forwarded the bug to the schooltool project and closed the ubuntu task. Thanks for your report and investigation.

[Ignas Mikalajūnas (ignas)]

I think this should be solved now, though as I can't reproduce it - there is no way to check.

Brian Sutherland did some packaging changes recently, and I think he mentioned some fixes.

Maybe you still can reproduce it?

[Brian Sutherland (jinty)]

From the dates, I'm assuming seems that my fixes were the problem. But, I can't reproduce the the bug.

[tian (nopararas)]

I got a similar problem when running a routine update.

I attach the last part of the output from
sudo apt-get dist-upgrade -o "Debug::pkgProblemResolver=1"

I am trying to solve it by
1. uninstalling schooltool2008
2. runnning the update
3. reinstalling schooltool.

1 and 2 are going on fine.
If a write no other post take for granted step 3 went well too.