If the installer says it cannot find ArcGIS 10.8, it means your registry keys are broken or you are running an incompatible software version. Ensure you are not attempting to install the ArcGIS Pro version (GeoHECHMS) on ArcGIS Desktop 10.8. Missing Buttons or "Failed to Create COM Component"
The information provided in this blog post is for educational purposes only. The author and the blog owner are not responsible for any damage or loss caused by the use of HEC-GeoHMS or ArcGIS. Always follow the terms and conditions of the software license agreement.
(This must be licensed and explicitly enabled inside ArcMap). Microsoft .NET Framework 4.5 or higher.
What of ArcGIS are you running? (e.g., 10.8.1, 10.8.2) What operating system are you using? Do you have an active Spatial Analyst license? download hec geohms for arcgis 108 exclusive
Download HEC-GeoHMS for ArcGIS 10.8: The Ultimate Installation Guide
What or behavior are you encountering, if any?
: This extension is required to perform the necessary terrain analysis. If the installer says it cannot find ArcGIS 10
With ArcMap Desktop retiring in 2026 , the development focus has shifted entirely to ArcGIS Pro and standalone HEC tools. Installation Prerequisites To run HEC-GeoHMS on 10.8, ensure you have: ArcMap 10.8.x installed and activated. The Spatial Analyst extension enabled.
To download and install HEC-GeoHMS for ArcGIS 10.8 , you can follow this guide . Note that while the U.S. Army Corps of Engineers (HEC)
: Starting with HEC-HMS version 4.8 (released April 2021), GIS capabilities like watershed delineation and parameter estimation are built directly into the HEC-HMS software. The author and the blog owner are not
To ensure exclusive installation for ArcGIS 10.8:
HEC-GeoHMS version 10.7 or 10.7.x is the designated functional release for ArcGIS 10.8 environments. Because ArcGIS 10.8 shares the same underlying Python 2.7 architecture and ArcObjects framework as version 10.7, the 10.7 extension offers full backward and forward compatibility. Prerequisites Before Installation
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