Orthographic projection and irregular data grid

Hi,

I have come across an issue concerning the visualization of non regular
data.
Here is a script and the data is on the ftp server (file named
"data_orthographic_29112011.dat")

The orthographic projection looks fine when "mpCenterLatF" is positive
(between 90 and 0).
Otherwise, NCL crashes with :

     fatal:ContourPlotDraw: CTTMTL/ICAEDG - LOGIC ERROR
      ERROR 6 IN CTTMTL/ICAEDG - LOGIC ERROR
     fatal:ContourPlotDraw: CTMESH - UNCLEARED PRIOR ERROR
     fatal:ContourPlotDraw: draw error
     warning:WorkstationDeactivate: workstation not active or not opened

Regards

-- 
  Alexis Praga

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