This error occurs when a user is trying to update the Live Data files and users are still accessing live data files.
Make sure everyone is out of the program. Either use the Pervasive Monitor to kick everyone out, or stop and restart the Pervasive services running on the server. Be sure that no users get back into the program before the update has finished updating the database.
You may need to delete the update folder within the live data directory before you can restart the update.