"GeoRaster cell data error: %s"
*Cause: There was an error in the original GeoRaster cell data or in the
cell data of the pyramids.
*Action: If the error is related to the original GeoRaster cell data, the
GeoRaster object is invalid and has to be deleted or manually
repaired. If the error is related to pyramids, delete the pyramids
and regenerate them.