Hello.. I want to use raster calculator in ArcObject. This is my code.. Dim expression As String = "'" & bef_tif(0).FullName & "' + '" & aft_tif(0).FullName & "'" Dim outputpath As String = Application.StartupPath & "\ChangeDetection\abc" Dim geoprocessor As GeoProcessor = New GeoProcessor() Dim ToolRasterCalc As SpatialAnalystTools.RasterCalculator = New SpatialAnalystTools.RasterCalculator(expression, outputpath) geoprocessor.OverwriteOutput = True geoprocessor.AddOutputsToMap = True Dim pParamarray As IVariantArray = New VarArrayClass() pParamarray.Add(expression) pParamarray.Add(outputpath) Dim result As IGeoProcessorResult = geoprocessor.Execute("raster_calculator", pParamarray, Nothing) Error messege is HRESULT E_FAIL, Error code is -2147467259.. Plz help me ....
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