Latest Contributions by HenryColgate

When trying to use the arcpy.env.autoCancelling feature I seem unable to call arcpy.Delete_management() after cancellation without encountering a 000582 error. The code below replicates the error when used as an ArcToolbox Python script if the Cancel button is pressed during the process.  The sleep delay is probably unnecessary but gives some breathing space. The code is a simplified and parameter/input free version of the ESRI example here. The workspace variable needs to be modified prior to set up. import time import arcpy arcpy.env.autoCancelling = False def my_function(): temp_tables = ['replicant_1', 'replicant_2', 'replicant_3', 'replicant_4'] workspace = r'C:/Users/username/Documents/ArcGIS/Default.gdb' try: for fc_name in temp_tables: arcpy.CreateFeatureclass_management(workspace, fc_name, 'POINT') arcpy.AddMessage('WAITING') time.sleep(3) arcpy.AddMessage('FINISHED') if arcpy.env.isCancelled: raise Exception('Tool has been cancelled') except Exception as err: arcpy.AddError(err) finally: # If tool is cancelled or finishes successfully, clean up if temp_tables: for temp_table in temp_tables: arcpy.AddMessage(temp_table) try: arcpy.Delete_management(temp_table) except Exception as err: arcpy.AddError('DELETE FAILED') arcpy.AddError(err) if __name__ == '__main__': my_function()‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ I've tried checking that the data exists and that there are no locks and neither of these seem to be the issue. I've also tried as background and foreground geoprocessing. It fails in both ArcMap 10.5 and ArcGIS Pro 2.4 (the code is good to switch between Python 2.x and 3.x) Interestingly if I run the Toolbox again immediately after and at least one of the created files exists and arcpy.env.overwriteOutput is False this causes an error which is caught by the general exception handler and all of the existing files are deleted as expected. This indicates to me that the parameters are valid which is at least half the issue found in the 000582 Error Explanation so maybe it is the Execute Implementation? ... View more

When using arcpy.Append_management and using "NO_TEST" we only map to those fields that are identical. However when we use arcpy.FieldMappings() we seem to lose all of the automatic mappings and all fields must be explicitly mapped.  Is there a way to keep the automated mapping and just map those that aren't identical OR overwrite ones that need to be updated? ... View more

I am trying to use IRasterLayerExport3 to export a non-standard raster, pixel width 17x13, to a standard format, 13x13 via ArcObjects.  The problem is that every attempt I make brings the data down to a value in the range 0-255 as opposed to the floating point numbers contained in the original data. It appears that the Raster Renderer is being forced though it is unselected by default when using Data-->Export in ArcGIS --> Use Renderer. The Developer Help page states "If you don�??t want to use the raster renderer to filter the pixel values during the export, remove the raster renderer from the raster layer before passing it to the RasterLayerExport object." http://resources.esri.com/help/9.3/arcgisengine/ArcObjects/esriCarto/IRasterLayerExport_RasterLayer.htm However it is not explained how this could be achieved.  The simples solution as I see it using the command 'rasterLayer.setRendererByRefto(null);' crashes the program with an Invalid Pointer Automation Exception. I am using ArcGIS 10 however I could only find reference to the renderer info in the 9.3 version so that is why I have chosen that link. ... View more