[errno=1101] in gsn_csm_pres_hgt

Hallo,

I have a very simple model output and attempted to visualize it using
"gsn_csm_pres_hgt" of ncl.
However, I always get this errors:

*warning:ContourPlotInitialize: no valid values in scalar field;
ContourPlot not possible:[errno=1101]*
*warning:LlSetValues: invalid range for Y Axis log mode; setting trYLog off*

Please find in the attachment my simple code, and here are the some details
of the data run:

*u = short2flt(f->uwnd) *

Variable: u
Type: float
Total Size: 510630912 bytes
            127657728 values
Number of Dimensions: 4
Dimensions and sizes: [time | 528] x [level | 23] x [lat | 73] x [lon | 144]
Coordinates:
            time: [508416..893376]
            level: [1..1000]
            lat: [90..-90]
            lon: [ 0..357.5]
Number Of Attributes: 6
  _FillValue_original : -32767
  _FillValue : -32767
  missing_value_original : -32767
  units : m s**-1
  long_name : U velocity
  missing_value : -32767

----
Variable: utrend
Type: float
Total Size: 510630912 bytes
            127657728 values
Number of Dimensions: 4
Dimensions and sizes: [time | 528] x [level | 23] x [lat | 73] x [lon | 144]
Coordinates:
            time: [508416..893376]
            level: [1..1000]
            lat: [90..-90]
            lon: [ 0..357.5]
Number Of Attributes: 7
  anomaly_op_ncl : Anomalies from Annual Cycle: calcMonAnomTLLL:
contributed.ncl
  missing_value : -32767
  long_name : U velocity
  units : m s**-1
  missing_value_original : -32767
  _FillValue : -32767
  _FillValue_original : -32767
----
Variable: filter
Type: float
Total Size: 510630912 bytes
            127657728 values
Number of Dimensions: 4
Dimensions and sizes: [time | 528] x [level | 23] x [lat | 73] x [lon | 144]
Coordinates:
            time: [508416..893376]
            level: [1..1000]
            lat: [90..-90]
            lon: [ 0..357.5]
Number Of Attributes: 8
  anomaly_op_ncl : Anomalies from Annual Cycle: calcMonAnomTLLL:
contributed.ncl
  missing_value : -32767
  long_name : U velocity
  units : m s**-1
  missing_value_original : -32767
  _FillValue : -32767
  _FillValue_original : -32767
  wgt_runave_op_ncl : wgt_runave_n
------
Variable: uz
Type: float
Total Size: 3546048 bytes
            886512 values
Number of Dimensions: 3
Dimensions and sizes: [time | 528] x [level | 23] x [lat | 73]
Coordinates:
            time: [508416..893376]
            level: [1..1000]
            lat: [90..-90]
Number Of Attributes: 9
  anomaly_op_ncl : Anomalies from Annual Cycle: calcMonAnomTLLL:
contributed.ncl
  missing_value : -32767
  long_name : U velocity
  units : m s**-1
  missing_value_original : -32767
  _FillValue : -32767
  _FillValue_original : -32767
  wgt_runave_op_ncl : wgt_runave_n
  average_op_ncl : dim_avg_n over dimension(s): lon
===
Thanks for your help.
Regards,
-- Folova

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