A Session Control Tower Maintenance entity stores information about
     entries in the Tower Maintenance data base. A Tower Maintenance entity is
     automatically created when a client issues a dnaKeepMeHere call, using
     the programming interface.

1  –  counters

   UPDATE FAILURES

       Number of times this entity detected an update failure event.

   UPDATE SUCCESSES

       Number of times that the DNA$Towers attribute of the DECdns object name
       associated with this entity has been successfully updated.

2  –  status

   MANAGING CLIENT

       Network management name of the user who issued the keepmehere call that
       resulted in the creation of this entity.

   HIGHER TOWERS

       Set of higher towers that was passed in the keepmehere call that created
       this entity.

   LAST FAILURE REASON

       DECdns error code that indicates the reason for the last update failure.

   LAST SUCCESSFUL UPDATE

       Time of the last successful update to the DNA$Towers attribute for the
       specified entity. On OpenVMS, if no update for this subentity ever failed,
       then it is zero.

   LAST UPDATE COMPLETED

       Time that the last attempt to update the DNA$Towers attribute completed
       successfully or not.

   LAST UPDATE STARTED

       Time that the last attempt to update the DNA$Towers attribute for the
       specified entity was initiated.