Hey Mark thanks for tht info.. i was succeful in terrain processing tool.. Now i want to export my project to HMS for tht i used tool of GEO HMS main project to start new project and defined project point and project area. Now while using "generating HMS Project" it shows me following error "System.Runtime.InteropServices.COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component. at ESRI.ArcGIS.Geoprocessing.GeoProcessorClass.GetEnvironmentValue(String environmentName) at HECGeoHMS9.GenerateProject.UpdateAHD(String rasterLocation, String vectorLocation, String ahProjName)" Can you pls help me how to overcome this error. i m using ARCGIS 9.3 and GEOHMS 4.2.(downloaded from ESRI's ftp server.) Thanks Niket.
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