[ncl-talk] when creating a nc file, and assign _FillValue in it, error generated!

[dyjbean at 163.com]

hi,
  when i create a nc file with ncl , and assign _FillValue in it, part of code shows the following:
+++++++++++++++++++++++++++++++++++++++++++++  
  filevardef(fout01,"FSDS","float",(/"time","lat","lon"/))
      FSDSatt           =    True
      FSDSatt at mode      =    "time-dependent"
      FSDSatt at units     =    "W/m2"
      FSDSatt at long_name =    "incident solar (FSDS)"
      FSDSatt at _FillValue=9.999E20
      filevarattdef(fout01,"FSDS",FSDSatt)
   ++++++++++++++++++++++++++++++++++++++++++++

but the error information from the operation shows the below:
ncendef: ncid 131072: NetCDF: Not a valid data type or _FillValue type mismatch

i want to know how to assign _FillValue in nc file in ncl script?

thanks 



dyjbean at 163.com
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