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  Routine:      CBL_SUBSYSTEM
 
  Function:     Declares or deallocates subsystems.
 
  Syntax:       CALL "CBL_SUBSYSTEM" USING      function-code
                                                parameter
                                     RETURNING  status-code
 
  Parameters:   function-code          PIC X COMP-X.
                                       Contains one of the following
                                       subfunction numbers:
 
                                       0 = declare subsystem
                                       1 = cancel subsystem
                                       2 = remove from subsystem
 
               With function-code = 0
                   parameter           Group item defined as:
                     ss-handle           PIC X(2) COMP-X.
                     ss-name-len         PIC X(2) COMP-X.
                     ss-name             PIC X(n).
 
               With function-code = 1
                   parameter          PIC X(2) COMP-X.
 
               With function-code = 2
                   parameter          PIC X(2) COMP-X VALUE 0.
 
               status-code            See ◄Key►
                                    -♦-