Thanks for the ideas. Alas, they did not work for either the Community Edition nor the official Jaspersoft version. We did learn that modifying the jrxml file outside of the studio, we were able to modify the file in such a way that we could successfully run using this line. <parameter name="net.sf.jasperreports.json.source" class="json"> Again - thank you for the suggestion. I hope this 'trick' works going forward.