By clicking on Menu Validate or the corresponding tick icon in the toolbar you can check whether the project contains any setup errors (see Fig. 3.10). Successful validation is required before attempting to submit a project. In contrast, warnings are simply for your attention, and do not prevent you from submitting a technically sound proposal. Double-clicking on an error message will take you to the relevant Science Goal, so that you can easily identify and correct for the problem. If all is well, the Feedback pane will report ``No problems found'' (Fig. 3.11). Your project is now ready to be submitted!