Error during update

[Per L]

I tried to update breezy with apt-get update.
Checked with others that my sourcelist was ok. It was.
Then I executed the command:
gksudo "update-manager -d"

After about 2 min I got the following message in a message-box.

'Error during update

A problem occured during the update. This is usually some sort of network problem, please check your network connection and retry.'

I closed the message-box and got this message:

Traceback (most recent call last):

  File "/tmp/tmpO4bQyc/dapper", line 28, in ?
    app.run()

  File "/tmp/tmpO4bQyc/DistUpgradeControler.py", line 499, in run
    self.dapperUpgrade()

  File "/tmp/tmpO4bQyc/DistUpgradeControler.py", line 440, in dapperUpgrade
    self.abort()

  File "/tmp/tmpO4bQyc/DistUpgradeControler.py", line 421, in abort
    self.sources.restoreBackup(self.sources_backup_ext)

AttributeError: 'DistUpgradeControler' object has no attribute 'sources'

/* regards Per L / stockholm, sweden */

[Basilio Kublik (sourcercito)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. You reported this bug a while ago and there hasn't been any activity in it recently. We were wondering is this still an issue for you? Can you try with latest Ubuntu release? Thanks in advance.

[Pedro Villavicencio (pedro)]

Closing this bug report as no further information has been provided. Please feel free to reopen this bug if you can provide the information asked for. Thanks!.