ownCloud unable to add new users – A user with that name already exists.

Using owncloud 8.2, when adding a new user it can error saying that the user already exists, regardless what username you put in.

owncloud user already exists

This turned out to be a problem with an App called “User backend using remote HTTP servers”, disabling this resolved this error for me.

If you are using the standard ownCloud authentication method then this App should not need to be enabled.

Owncloud: csync failed to create a lock file

I use the Owncloud client to synchronise important files between my laptop and desktop computers. Recently the client failed immediately on start-up with the error “csync failed to create a lock file”. To resolve this issue, locate and remove the lock file.

On version 1.2.x the lock file can be found in the following locations, depending on which OS you are using.




~/Library/Application Support/ownCloud/lock



Take heed: Left-over “stale” lock files are usually safe to remove, however if multiple instances of the same program are running, such as in a separate user session, removing the lock file can cause write-conflicts and corrupt your data, so be warned! Only remove the file if you’re sure it’s not being used by another running instance of the Owncloud app.


Thanks to Markus for providing the Mac OSX location