Under 'Statistic Type' there is a drop down box. You need to select the summary statistic type first and then run the tool.
Chelsea, can you load the picture into Geonet instead? I really don't want to sign up for yet another website!
I'm guessing the problem was solved by everyone by completing all the parameters in order in the tool dialog.
Graham and Kumar,
Could you share how you solved the problem?
http://www.pinterest.com/pin/create/extension/
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