SQL$HELP72.HLB  —  Errors  SQL_ERRORS, CANTCLOSEDB
  database could not be closed as requested

  Explanation:  The database monitor detected an error while
  attempting to close the database you specified.

  User Action:  Examine the secondary message(s) or look in the
  database monitor log file (SYS$SYSTEM:*MON.LOG) for more
  information.
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