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The problem affects interpolations from:

• input original reduced Gaussian grid point fields to output regular Gaussian or regular latitude-longitude grids (without rotation)
• input octahedral

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• reduced Gaussian grid point fields to output regular Gaussian or regular latitude-longitude grids (without rotation).

Which interpolations are not affected ?

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• Interpolations to rotated latitude-longitude grids are unaffected
• Transformations from spherical harmonic components to grid point fields are unaffected.