[gradsusr] Trying to open CCSM4 Historical run .nc file

[aftab jajja]

  hiI am trying to open CCSM4 historical run .nc file  with following information.
> cdo sinfo va_Amon_CCSM4_historical_r1i1p1_185001-189912.nc    File format: netCDF    -1 : Institut Source   Ttype    Levels Num  Gridsize Num Dtype : Parameter ID     1 : unknown  CCSM4    instant      17   1     55296   1  F32  : -1               Grid coordinates :     1 : lonlat       > size      : dim = 55296  nx = 288  ny = 192                        lon       : first = 0  last = 358.75  inc = 1.25  degrees_east  circular                        lat       : first = -90  last = 90  inc = 0.942408377  degrees_north                        available : xbounds ybounds   Vertical coordinates :     1 : pressure              Pa : 100000 92500 85000 70000 60000 50000 40000 30000                                     25000 20000 15000 10000 7000 5000 3000 2000 1000    Time coordinate :  600 steps     RefTime =  1850-01-01 00:00:00  Units = days  Calendar = 365_day  Bounds = true  YYYY-MM-DD hh:mm:ss  YYYY-MM-DD hh:mm:ss  YYYY-MM-DD hh:mm:ss  YYYY-MM-DD hh:mm:ss  1850-01-16 12:00:00  1850-02-15 00:00:00  1850-03-16 12:00:00  1850-04-16 00:00:00  1850-05-16 12:00:00  1850-06-16 00:00:00  1850-07-16 12:00:00  1850-08-16 12:00:00 .....................................................................
when i used Grads sdfopen command followind was the error message
ga-> sdfopen va_Amon_CCSM4_historical_r1i1p1_185001-189912.nc Scanning self-describing file:  va_Amon_CCSM4_historical_r1i1p1_185001-189912.ncSDF Error: 365 day calendars are no longer supported by sdfopen.  To open this file with GrADS, use a descriptor file with   a complete TDEF entry and OPTIONS 365_day_calendar. 
i tried  the following script but the problem is not solved.
DSET sdfopen ^va_Amon_CCSM4_historical_r1i1p1_185001-189912.nc 
OPTIONS 365_day_calendarTDEF 600 12 12Z16jan1850 1mo
the error message is
ga-> xdfopen year_365.ctlScanning Descriptor File:  not_leap_year.ctlgadxdf error: Missing or invalid dimension scaling type  --> The invalid description file record is:   --> tdef 600 12 12z016jan1850 1mo  The data file was not opened. 
any clue to this problem
regards 
Aftab ahmadJajja Jatt
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