Hi Jim,we solved similar issue lately. We found in XML definition that the metapath to query is not dynamically updated. You can modify the report definition, however a new report is created, if you open it from clipboard.
We used Cognos DRU tool that updates the XML in the report.1. The behavior seems like a Cognos bug.2. It would be great to modify the XML definition in the report studio. I created an idea https://ibm-data-and-ai.ideas.aha.io/ideas/CA-I-3259