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Below is an xpath that works. It returns all the values of the [U][B]value[/B][/U] attribute of the OutputField tag: [CODE] //Satellite/multidataset/file[contains(@name, '311multi')]/Data/DriftAnalysis[contains(@name, '311')]/Metric[@name='Detail' and @type='Overlap']/Element[@metrictype='Overlap']/OutputField[@name='Cleared']/@value [/CODE] But when I try to sum the returned values of the [U][B]value[/B][/U] attribute like the example below I get the error "Expression must evaluate …
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