MC description problem

[=?big5?B?QW50b24gQ2hlbiBcKCCzr6XDqfogXCk=?= <anton@xxxxxxxxxxxxxxxxxxxxx>]

Hi all ferret users:

I try to produce the MC description file to converge mutiple NCEP reanalysis data files by the mkdes tool from http://ferret.wrc.noaa.gov/Ferret/Mail_Archives/fu_2002/msg00168.html. But I still can't use the produced description file. The error message is
--------------------------------------------------------------------
yes? use ncep_air 
**TMAP ERR: Error in namelist record
                        Error in: FORMAT_RECORD; or file not descriptor file
                        Data set: ncep_air.des
-----------------------------------------------------------------

and the following is my ncep_air.des description. Any idea to solve it or I made somthing wrong?

Anton

**********************************************************************************
$FORMAT_RECORD
   D_TYPE        = '  MC',
   D_FORMAT      = '  1A',
 $END

 $BACKGROUND_RECORD
   D_TITLE       = 'mean daily NMC reanalysis (1948)',
   D_T0TIME      = '',
   D_TIME_UNIT   = 3600.0,
   D_TIME_MODULO = .false.,
 $END
 
 $MESSAGE_RECORD 
      D_MESSAGE     = ' ',
      D_ALERT_ON_OPEN      = F,
      D_ALERT_ON_OUTPUT    = F,
 $END
   
 $EXTRA_RECORD
 $END           

 $STEPFILE_RECORD
   S_FILENAME    = 'air.1948.nc',
   S_AUX_SET_NUM = 0,
   S_START       = 17067072.0,
   S_END         = 17075832.0,
   S_DELTA       =  24.0,
   S_NUM_OF_FILES       = 1,
   S_REGVARFLAG  = ' ',
 $END

 $STEPFILE_RECORD
   S_FILENAME    = 'air.1949.nc',
   S_AUX_SET_NUM = 0,
   S_START       = 17075856.0,
   S_END         = 17084592.0,
   S_DELTA       =  24.0,
   S_NUM_OF_FILES       = 1,
   S_REGVARFLAG  = ' ',
 $END

 $STEPFILE_RECORD
   S_FILENAME    = 'air.1950.nc',
   S_AUX_SET_NUM = 0,
   S_START       = 17084616.0,
   S_END         = 17093352.0,
   S_DELTA       =  24.0,
   S_NUM_OF_FILES       = 1,
   S_REGVARFLAG  = ' ',
 $END

 $STEPFILE_RECORD
   S_FILENAME    = 'air.1951.nc',
   S_AUX_SET_NUM = 0,
   S_START       = 17093376.0,
   S_END         = 17102112.0,
   S_DELTA       =  24.0,
   S_NUM_OF_FILES       = 1,
   S_REGVARFLAG  = ' ',
 $END

 $STEPFILE_RECORD
   S_FILENAME    = 'air.1952.nc',
   S_AUX_SET_NUM = 0,
   S_START       = 17102136.0,
   S_END         = 17110896.0,
   S_DELTA       =  24.0,
   S_NUM_OF_FILES       = 1,
   S_REGVARFLAG  = ' ',
 $END

 $STEPFILE_RECORD
   S_FILENAME    = 'air.1953.nc',
   S_AUX_SET_NUM = 0,
   S_START       = 17110920.0,
   S_END         = 17119656.0,
   S_DELTA       =  24.0,
   S_NUM_OF_FILES       = 1,
   S_REGVARFLAG  = ' ',
 $END

 $STEPFILE_RECORD
   S_FILENAME    = 'air.1954.nc',
   S_AUX_SET_NUM = 0,
   S_START       = 17119680.0,
   S_END         = 17128416.0,
   S_DELTA       =  24.0,
   S_NUM_OF_FILES       = 1,
   S_REGVARFLAG  = ' ',
 $END

 $STEPFILE_RECORD
   S_FILENAME    = 'air.1955.nc',
   S_AUX_SET_NUM = 0,
   S_START       = 17128440.0,
   S_END         = 17137176.0,
   S_DELTA       =  24.0,
   S_NUM_OF_FILES       = 1,
   S_REGVARFLAG  = ' ',
 $END

 $STEPFILE_RECORD
   S_FILENAME    = '**END OF STEPFILES**',
 $END