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I'm trying to use Value table in python to do a multiple ring buffer in ArcGIS 10.1 and I'm getting the following error: ExecuteError: Failed to execute. Parameters are not valid. ERROR 000735: Distances: Value is required Failed to execute (MultipleRingBuffer).

Here's the code:

arcpy.env.workspace = Path
vTab = arcpy.ValueTable()
vTab.setRow = (0, "2")
vTab.setRow = (1, "10")
vTab.setRow = (2, "50")
inFeature = 'Test.shp'
outFeaute = 'Test_Output.shp'
dist = vTab
bufferUnit = "meters"
arcpy.MultipleRingBuffer_analysis(inFeature, outFeaute, dist, bufferUnit, '','ALL')
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There were a few syntax errors with the code. Rather than attempt to explain each one I have rewritten your code to show you how you should have written it. The main problem is that your vTab object was not being correctly updated.

arcpy.env.workspace = "c:/temp"
vTab = arcpy.ValueTable(1)
vTab.addRow(2)
vTab.addRow(10)
vTab.addRow(50)
inFeature = 'myPointLayer'
outFeature = 'Test_Output.shp'
bufferUnit = "Meters"
arcpy.MultipleRingBuffer_analysis(inFeature, outFeature, vTab, bufferUnit, 'distance','ALL')

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