the problem of wrf_cape.ncl

Hi,
   I downloaded the wrf_cape.ncl script from WRF website,I just changed the input file name,but it seems there is a problem when i using it under NCL5.1.0.
   Following is the information about the problem.

 [yangyh_at_gateway2 ncl]$ ncl wrf_cape.ncl
 Copyright (C) 1995-2009 - All Rights Reserved
 University Corporation for Atmospheric Research
 NCAR Command Language Version 5.1.0
 The use of this software is governed by a License Agreement.
 See http://www.ncl.ucar.edu/ for more details.

Variable: times
Type: string
Total Size: 104 bytes
            13 values
Number of Dimensions: 1
Dimensions and sizes: [13]
Coordinates:
Number Of Attributes: 2
  description : times in file
  _FillValue : missing
(0) 2009-03-23_12:00:00
(1) 2009-03-23_13:00:00
(2) 2009-03-23_14:00:00
(3) 2009-03-23_15:00:00
fatal:Either file (nc_file) isn't defined or variable (cape_2d) is not a variable in the file
fatal:Execute: Error occurred at or near line 543 in file $NCARG_ROOT/lib/ncarg/nclscripts/wrf/WRFUserARW.ncl
fatal:Execute: Error occurred at or near line 45 in file wrf_cape.ncl.
 
Could you please tell how to resolve this problem£¿
Thanks in advance!
Yuhua
     
                        

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Received on Wed Mar 25 2009 - 02:49:06 MDT