topic Geo-Ras Error whilst delineating floodplains in Water Resources Questions https://community.esri.com/t5/water-resources-questions/geo-ras-error-whilst-delineating-floodplains/m-p/456520#M2256 <HTML><HEAD></HEAD><BODY><SPAN>Hi All,</SPAN><BR /><BR /><SPAN>I am using Georas 4.3.93 with ArcGIS 9.3.1.</SPAN><BR /><BR /><SPAN>I have a georas project set up which uses the tile method with about 50 different TINs.&nbsp; I have imported my RAS data back in, delineated the water surface, and am at the stage of "floodplain delineation using Grid" and I receive an error message each time:</SPAN><BR /><BR /><SPAN>"Failed to create mask feature class</SPAN><BR /><SPAN>System.NullReferenceException:Object reference not set to an instance of an object.</SPAN><BR /><SPAN>at ESRI.ArcGIS.Geometry.ITopologicalOperator2.Intersect(IGeometry other, esriGeometryDimension resultDimension)</SPAN><BR /><SPAN>at HECGeoRAS.clsMFloodGRIDIntersection.GetMaskFeatureClass4Tile(IFeature pTileFeature, String sProfilename, IFeatureClass pBPFC, Boolean IsMaskTilePolygon)"</SPAN><BR /><BR /><SPAN>Can anyone shed any light on what is going wrong?</SPAN><BR /><BR /><SPAN>Thanks</SPAN><BR /><SPAN>Tim</SPAN></BODY></HTML> Tue, 19 Jul 2011 22:23:37 GMT TimHaeusler 2011-07-19T22:23:37Z Geo-Ras Error whilst delineating floodplains https://community.esri.com/t5/water-resources-questions/geo-ras-error-whilst-delineating-floodplains/m-p/456520#M2256 <HTML><HEAD></HEAD><BODY><SPAN>Hi All,</SPAN><BR /><BR /><SPAN>I am using Georas 4.3.93 with ArcGIS 9.3.1.</SPAN><BR /><BR /><SPAN>I have a georas project set up which uses the tile method with about 50 different TINs.&nbsp; I have imported my RAS data back in, delineated the water surface, and am at the stage of "floodplain delineation using Grid" and I receive an error message each time:</SPAN><BR /><BR /><SPAN>"Failed to create mask feature class</SPAN><BR /><SPAN>System.NullReferenceException:Object reference not set to an instance of an object.</SPAN><BR /><SPAN>at ESRI.ArcGIS.Geometry.ITopologicalOperator2.Intersect(IGeometry other, esriGeometryDimension resultDimension)</SPAN><BR /><SPAN>at HECGeoRAS.clsMFloodGRIDIntersection.GetMaskFeatureClass4Tile(IFeature pTileFeature, String sProfilename, IFeatureClass pBPFC, Boolean IsMaskTilePolygon)"</SPAN><BR /><BR /><SPAN>Can anyone shed any light on what is going wrong?</SPAN><BR /><BR /><SPAN>Thanks</SPAN><BR /><SPAN>Tim</SPAN></BODY></HTML> Tue, 19 Jul 2011 22:23:37 GMT https://community.esri.com/t5/water-resources-questions/geo-ras-error-whilst-delineating-floodplains/m-p/456520#M2256 TimHaeusler 2011-07-19T22:23:37Z