Some users on ArcGIS 10.8 have reported that specific "characteristic" tools (like river length or basin slope) may not function correctly in the HEC-GeoHMS toolbar. Steps for Setup Runoff estimation using HEC-Geo HMS and ArcGIS/ArcMap
installed. It is not compatible with ArcGIS Pro; for Pro, you must use the internal GIS tools in HEC-HMS. Extensions : You must have the Spatial Analyst 3D Analyst extensions active in your ArcMap environment. : Typically requires an Advanced level license for full functionality of associated geospatial toolsets. Hydrologic Engineering Center (.mil) Recommended Alternative download hec geohms for arcgis 108 exclusive
⚠️ Note: Version 10.2.2 is the for ArcGIS 10.x. There is no “HEC-GeoHMS 10.8”. The number “10.2.2” is the GeoHMS version; it is fully compatible with ArcGIS 10.8. Some users on ArcGIS 10