I have my last 2 contexts showing as Failed in the Device Manager. When I go to sync them up, i get this:
"Error in syncup VC: Error in committing transaction."
Any ideas? It seemed to happen on my last 2 contexts I added only. I am running A3(2.5).
This could be (and likely is) a very complex problem that would require developement engagement. I would recommend reviewing the following bug, which is similar, and see if the work-around listed of doing your CLI Sync for All contexts helps. Otherwise, I think you would need to go through Cisco TAC for a deep dive of the issue.
CSCtd49660 - Error in VC syncup,Error in Virtual transactions in DM
The above bug is not yet fixed in an availabe release. It is expected to be in the A3(2.6) release, although I'm not sure it would resolve your issue.
Hope this helps,