This happens when the report is referencing a view or a database field that doesn't exist or doesn't match what is expected.
For example, this could occur if you update your version of HIFIS and the database structure changes. Or it could occur if you're trying to run a report that references a view you do not have installed.
One possible fix is to install the missing view, if that is the problem.
Another possible solution is to update the report definition in Crystal Reports.