If you do not supply any data source when filling a report template, or if that data source supplied, either directly or obtained by the engine through the execution of a query, does not contain any records, the report-rendering engine will not produce any output by default (whenNoDataType="NoPage" by default). If you want to see something being generated even when there is no data in the supplied data source, then you should try set the whenNoDataType property to "AllSectionsNoDetail" for you report template. Another possibility is to provide a customized output to replace the empty report. You can do that by setting the whenNoDataType property to "noData". Then you have to add and customize the noData section in the report template.
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