TIN internal process error.

Hi All,

Does anyone know the different possible reasons for a "TIN internal process error." to occure during a raster interpolation using NaturalNeighbor interpolation method (IInterpolationOp3 interface) in VB.net?

I've such an error occuring sometimes, not always, depending on the data I wish to interpolate but can't find any logical reason for that.

Thanks in advance.

Cheers,
Cyril