I have been periodically receiving a general error notice on both of the computers that I have TM enabled on. The message says: Time Machine error: Unable to complete backup. An error occurred while copying files to the backup volume. Does anyone know what this means? If I manually start a backup, even seconds after the message, no other error appears. I have gone looking for files that TM might have missed updating after the error appears, but haven't been able to find anything to suggest a problem... Thanks for the help.