When running reports using multiple prompt settings, the data which will be available to be returned by the reports will be subject to Assignments and Visibility settings assigned to the user, their role and/or the report. If you do not have valid Assignments or data for any of the segment combinations selected, you will receive the following Prospero dialog indicating which prompts cannot return data:
Any valid permutation will, however, continue to execute and return reports with valid data.
When executing the report for one prompt combination, if no data can be returned, you will receive the standard Prospero warning message: