Upgrade in update manager: "A fatal error occurred"

[Kirus]

Greetings everyone!

When trying to upgrade my Kubuntu system from 10.04 to 10.10, I get the following error (i've attached the suggested log files). Is it a known bug? Is there a sollution?

Thanks in advance.

K


-- message ----
A fatal error occurred

Please report this as a bug (if you haven't already) and include the files /var/log/dist-upgrade/main.log and /var/log/dist-upgrade/apt.log in your report. The upgrade has aborted.
Your original sources.list was saved in /etc/apt/sources.list.distUpgrade.


Traceback (most recent call last):

File "/tmp/tmp4UtdNa/maverick", line 7, in <module>
sys.exit(main())

File "/tmp/tmp4UtdNa/DistUpgradeMain.py", line 158, in main
if app.run():

File "/tmp/tmp4UtdNa/DistUpgradeController.py", line 1616, in run
return self.fullUpgrade()

File "/tmp/tmp4UtdNa/DistUpgradeController.py", line 1534, in fullUpgrade
if not self.updateSourcesList():

File "/tmp/tmp4UtdNa/DistUpgradeController.py", line 664, in updateSourcesList
if not self.rewriteSourcesList(mirror_check=True):

File "/tmp/tmp4UtdNa/DistUpgradeController.py", line 486, in rewriteSourcesList
distro.get_sources(self.sources)

File "/tmp/tmp4UtdNa/distro.py", line 103, in get_sources
source.template.official == True and

AttributeError: 'Template' object has no attribute 'official'

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[LinuxFan999]

upgrading through the update manager is not recommended. Burn a CD of the version of Ubuntu you want to upgrade too. Then, back up your data and do a clean install with the CD you burned.

Kubuntu 10.10 will be supported for only 2 more months, so I would recommend going to 11.04.