Unable to update cross scetion elevations using HEC-GeoRAS

Discussion created by jak1986 on Jun 29, 2011
Latest reply on Mar 22, 2012 by gwerren

I???ve created some Cross Section CutLines in ArcGIS 9.3.1 using HEC-GeoRAS 4.3.93 and converted them to 3D lines by extracting elevations from a TIN model. However, the TIN model doesn???t have elevations for the river channel. Therefore I???ve tried to update the channel part of the cross section profiles by using the ???Update XS CutLine Profiles??? function in HEC-GeoRAS. The function uses bathymetry points to snap to the closest point on the cutline profile.

My problem is that it doesn???t work. Below are examples of the error messages I???m receiving:

Failed to update elevation XS OID 1 at station: 7544.006 Item not found in this collection

Failed to update elevation XS OID 2 at station: 7480.642 Unable to cast COM object of type ???System._ComObject??? to interface type ???ESRI.ArcGIS.Geometry.IPolygon???. This operation failed because the QueryInterface call on the COM component for the interf???.*

*The message stops there, it doesn???t allow me to read the rest of it.

I have no idea what these messages mean and how to fix them. If anyone is able to help me then I would be very grateful


James Keys
Postgraduate at University of Brighton, UK