[ncl-talk] Error in running wheeler- kiladis script

[Aditi Modi]

Dear all,

I am trying to plot the wheeler kiladis diagram for the OLR daily data from
NOAA and the following ncl script shows the error:

nMsg=390635003  User must preprocess to remove _FillValue
(0)               FFTs do not allow missing values!!

Script: My NCL version (6.1.2)

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/diagnostics_cam.ncl"

  case     = "wheeler"
  diro    = "./"
  latN    = 15
  latS    = -latN

  nDayWin = 96
  nDaySkip =1

   opt  = True
   opt at debug= True
   opt at pltType     = "eps"
   opt at cnLinesOn   = False   ; turn off contour lines

   spd = 1
   var = "olr"

 setfileoption("nc", "FileStructure", "Advanced")

   f =  addfile("olr.day.mean.nc", "r")
 sla =  f->olr(:,{latS:latN},:)

olr at _FillValue = olr at missing_value

 wkSpaceTime (olr, diro, case, var,latN, spd, nDayWin, nDaySkip, opt  )
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