[ncl-talk] Problem with cd_calendar in a time filter

[Lyndz]

Dear NCL-experts,

*Details/Problem:*

I am extracting the dates from a netcdf file that satisfy some criteria.
But, I am getting the following errors with the cd_calendar (i.e., negative
dates):

Variable: n_thres
Type: integer
Total Size: 4 bytes
            1 values
Number of Dimensions: 1
Dimensions and sizes: [1]
Coordinates:
Number Of Attributes: 1
  _FillValue : -2147483647
*(0) -2147483647*
(0) =====
fatal:Subscript out of range, error in subscript #0
fatal:An error occurred reading YMD
fatal:["Execute.c":8637]:Execute: Error occurred at or near line 62 in file
date_filter.ncl

*Descrition of files:*

Below are the ncdump -h of the two netcdf files:
************************************************************************************************************
Variable: q_region
Type: float
Total Size: 17472 bytes
            4368 values
Number of Dimensions: 3
Dimensions and sizes: [time | 728] x [lat | 3] x [lon | 2]
Coordinates:
            time: [1884648..1893402]
            lat: [ 5..10]
            lon: [122.5..125]
Number Of Attributes: 4
  long_name : QDIV: vertically integrated
  units : kg m-2 s-1
  sum_op_ncl : dim_sum_n function was applied
  _FillValue : -32767
(0) QDIV: vertically integrated (kg m-2 s-1) : min=-5.91443e-05
max=6.08617e-05
**********************************************************************************************************
Variable: def_region
Type: float
Total Size: 17472 bytes
            4368 values
Number of Dimensions: 3
Dimensions and sizes: [time | 728] x [lat | 3] x [lon | 2]
Coordinates:
            time: [1884648..1893402]
            lat: [ 5..10]
            lon: [122.5..125]
Number Of Attributes: 4
  long_name : deformation
  units : 1/s
  information : sqrt[shear^2 + stretch^2 ]
  NCL_tag : shear_stretch_deform
(0) deformation (1/s) : min=1.76384e-07   max=6.16582e-05
*************************************************************************************************************

*What I have so far:*
Attached is the script that I am using.

I uploaded my files here:
File 1: https://www.dropbox.com/s/visztwdsx1kz93q/mdiv.1979.nc?dl=0
File 2:
https://www.dropbox.com/s/omecvv8qm71uz1h/shear_stretch_deform_1979.nc?dl=0

I'll appreciate any help on how to do this correctly in NCL.

Sincerely,

Lyndz
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