I am following Dr. Merwade's tutorial http://web.ics.purdue.edu/~vmerwade/education/cngrid.pdf but am running into troubles creating the Curve Number grid using the HEC-GeoHMS extension in ArcGIS. Specifically, in the last step of creating the CN Grid, ArcGIS/HEC-GeoHMS produces the layer CNgrid, but there is no attribute table. Any ideas on what might be going wrong? I am using ArcMap 10.5.1 with HEC-GeoHMS 10.5 and Arc Hydro 10.5. Thank you!