040403 : Cells are only deemed to be inside a polygon if the cell center falls inside the polygon's boundary. Polygon FID = <value> does not include any cell centers, so no statistics will be calculated for it.
Results for Gaussian Geostatistical Simulations in areas (polygons) of interest will only be calculated if the polygon includes at least one simulated cell center within its boundary. If the polygon does not include any cell centers, no summary statistics will be calculated for it.
Check that the polygon(s) specified in the warning message include at least one cell center. This can be done visually or by using the Raster To Point tool to plot the centers of all the cells in the output raster.