There are 4 no return tiles. In this delivery, all 8191 tiles are present in the be_rasters, DSMs, swath_separation_images,and Intensity_Imagery deliverables. In the  folders maximum_surface_height_raster, and tilecls there are 8187 tile with those four tiles mentioned removed. These four tiles are 14TNN430560,14TNN480530,14TNN560480,14TNN500520 and are also indicated in the attributes table of the tile grid.