While trying to generate flood map using HEC-GeoRAS for the data I imported from HEC-RAS, the following error occurs. Can anyone help me how to resolve and continue? Failed to create water surface tin: Runtime.InteropServices.COMException (0x80040833): TIN internal process error. At ESRI.ArcGIS.Geodatabase.TinClass.AddFromFeatureClass(IFeatureClass PFeatureClass, IQueryFilter, IField pHeightField, IField p TagvalueField, esri TinSurface Type Type, Object& pbUseShapeZ) At HECGeoRAS. clsMFloodWaterSurface.CreateWSTin(FeatureClass pSrcFC, IFeatureClass pClipFC, IFeatureClass pWorkFC, String s TINName, String sProfileName) Best, Yared
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