User is trying to drill down into the details of a profit-and-loss report, but it is not working.
This can happen if you are not using the Viewer to preview the report. When you run a report, there is an option to select the Preview Format for it on the Customize Report > Options tab. If you select anything other than Viewer in this option, the drill-down does not work. You need to make sure the format is set to Viewer when running the report. Check CORE Help Center for details.