warning:ContourPlotInitialize: no valid values in scalar field; ContourPlot not possible:[errno=1101]

My script is not plotting the data, only giving warnings:
warning:ContourPlotInitialize: no valid values in scalar field; ContourPl=
ot not possible:[errno=1101]warning:MapTransSetValues: latitude min excee=
ds max: exchanging values
  f = addfile("sit1.nc", "r") t =f->media =
media= dim_avg_n_Wrap(t,0) wkstype= "png"wks = gsn_open_wks(wkstype=
,"ice_ipsl_NS")gsn_define_colormap(wks,"WhiteBlue")res = Trueres@gsnA=
ddCyclic = Falseres@mpMinLatF = -60res@mpMaxLonF = -90res@cnLevel=
SelectionMode ="ManualLevels"res@cnMinLevelValF =0 res@cnMaxLevelValF =
= 2res@cnLevelSpacingF = 0.1res@cnLinesOn = False res@cnF=
illOn = True res@gsnPolar = "SH" =
      plot = gsn_csm_contour_map_polar(wks,media({-60:-90},{0:360})=
,res) end
printVarSummary(t)
ariable: tType: floatTotal Size: 23328000 bytes 5832000 valuesNu=
mber of Dimensions: 3Dimensions and sizes: [time | 360] x [j | 90] x [i | 1=
80]Coordinates: time: [15.5..10934.5] j: [-87.86..87=
.86] i: [ 0..358]Number Of Attributes: 12 _FillValue : 1e+20 s=
tandard_name : sea_ice_thickness long_name : Sea Ice Thickness comment : =
the mean thickness of sea ice in the ocean portion of the grid cell (averag=
ing over the entire ocean portion, including the ice-free fraction). Rep=
orted as 0.0 in regions free of sea ice. units : m original_name : iiceth=
ic cell_methods : time: mean (interval: 30 minutes) area: mean where sea =
cell_measures : area: areacello history : 2011-11-11T12:43:09Z altered by =
CMOR: replaced missing value flag (9.96921e+36) with standard missing value=
 (1e+20). associated_files : baseURL: http://cmip-pcmdi.llnl.gov/CMIP5/dat=
aLocation gridspecFile: gridspec_seaIce_fx_IPSL-CM5A-LR_decadal1980_r0i0p0.=
nc areacello: areacello_fx_IPSL-CM5A-LR_decadal1980_r0i0p0.nc coordinates =
: lat lon missing_value : 1e+20

---Vanúcia SchumacherMestranda em Meteorologia - UFVMeteorologista -UFPel
Departamento de Meteorologia Agrícola - DEACel: (31) 9978 2522 DEA: (31) =
3899 1890 =

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Received on Thu Jun 12 07:14:52 2014