There may be a name (or group or section) in the Search for: box, in which case ICON is displaying only those students who meet that criteria (sometimes no students meet the criteria). If this is the case, delete the item in the Search for box and click on the Search button. If this doesn’t solve your problem, contact ICON support at icon-support@uiowa.edu or 335-6139.
If your students names have never appeared in your Grades List, you may need to activate your course. To do this, click on the Edit Course link on your course homepage, click Course Offering Information, and then click to place a checkmark in the IsActive? box, and then click Save.