CALL SEQUENCE...
       levrev  XIN XOUT OUTPUT
 
 
      DESCRIPTION...
       levrev - REVERSES THE ORDER OF LEVELS OF EACH SET IN A FILE
                MAXIMUM, MINIMUM NUMBER OF LEVELS ARE 999, 2
 
 
      AUTHOR  - J.D.Henderson, NOV 17/80.
      LAST REVISION: $Header: /home/cvs/RMNLIB/utils/rdiag/lspgm/levrev.ptn,v 4.11 2014/09/25 20:20:50 dugas Exp $
 
 
      INPUT FILE...
       XIN   = FILE OF (MULTI-LEVEL) SETS
 
      OUTPUT FILE...
       XOUT = COPY OF FILE XIN WITH LEVELS REVERSED.
 
 
      EXIT CONDITIONS...
        0 NO PROBLEMS
        1 TOO MANY LEVELS IN FIRST SET OF XIN
        2 MORE THAN ONE SIZE FOR ARRAYS IN XIN
        3 NOT ENOUGH LEVELS IN LAST SET READ