In HEC-RAS:
: If upgrading, always uninstall previous GeoRAS versions before installing the 10.8-compatible version. Data Representation hec georas for arcgis 10.8
While remains a trusted solution, the USACE has released HEC-GeoRAS for ArcGIS Pro (version 10.9+). Consider migrating if: In HEC-RAS: : If upgrading, always uninstall previous