Hi,
When I attempt to create Thiessen Polygons using Utility tools, I get the following message:
System.NullReferenceException: Object reference not set to an instance of an object.
at ESRI.APWR.ArcHydroGPTools.AHThiessenPolygon.Execute(IArray paramvalues, ITrackCancel trackcancel, IGPEnvironmentManager envMgr, IGPMessages message)
Failed to execute (CreateThiessenPolygons).
I also attached a pop-up error message that I received. Does anyone know what is going wrong here?
Thanks!
Mike
