Your guess is right. The problem very likely lies in the longitude interval of the global model (-180, 178.125). The interpolation subroutine does only look for longitudes outside this interval. In your case a longitude larger than 178.125 is requested. To solve this problem add the following line in the
GRID
_IN part of the namelist:
east_add_in=1,
This copies the first column of the input field to the end of the input field and such extends the interval to (-180, 180).
A similar problem may appear for the poles. In these cases the corresponding parameters are north_add_in and south_add_in.
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Your guess is right. The problem very likely lies in the longitude interval of the global model (-180, 178.125). The interpolation subroutine does only look for longitudes outside this interval. In your case a longitude larger than 178.125 is requested. To solve this problem add the following line in the GRID _IN part of the namelist:
This copies the first column of the input field to the end of the input field and such extends the interval to (-180, 180).
A similar problem may appear for the poles. In these cases the corresponding parameters are north_add_in and south_add_in.