Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am using Thunderbird with ubuntu since 2007. after the upgrade from 11.04 to 11.10 Ubuntu one show me this alert: <

"could not open address book" There was a problem opening the address book "Ubuntu One" - the message returned was: Cannot open book: Could not create DesktopcouchSession object>.

Please what is the meaning of the message and, overall, what can I do?

share|improve this question

Ubuntu One can be used to sync files, but also CouchDB databases. Thunderbird has a method to store an addressbook in your DesktopCouch (personal CouchDB) so that it can be synced between your computers. However, for some reason, it is not working. It's likely a bug in Thunderbird.

If you want to follow the progress of this bug, or add yourself as affected, you can find the bug report here:

share|improve this answer
Thank you, I have read your link and now it is all clear, I have only to wait – mario_user28404 Nov 6 '11 at 10:14

The above link helped me to solve the issue. Something to do with disabling an extension.

share|improve this answer
Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference, especially since that cannot be accessed without an Ubuntu Forums account. – Eliah Kagan Jul 21 '12 at 6:01

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.