This panel appears while a report is being generated. If the report being generated is very long, it may take some time to generate the report. However, at any time you can press the "Stop" button to stop any more of the report from being generated. This generally still leaves a useful report, since the reports list the most important information first. When you stop the generation of a report before it has completed, the last line of the report shown will be "..." so that you can see that the report is incomplete.