It appears to be an issue with the database. See this similar thread http://forum.conceiva.com/showthread...tion-file-quot. The database may be corrupted so if you have a backup of the database you can go to your database folder which is usually c:\users\<username>\appData\local\Conceiva\Mezzmo and replace the database with the backup. If you don't have a backup then you may have to delete the database and start with a new clean database, you can rename or delete the Mezzmo folder in the above location to do this.