Messages in the Device category show errors and warnings related to the device specified in the Device column. For more details about an error, click the + button in the Message header title. This will expand the message to include details about the error as posted by the DME subsystems.
A device-related error could be that a SmartLink reference could not be downloaded due to an invalid link.
The message could also be the result from a diagnostic test forced from a device by the server.