I have the following formula in a query...
DateOfEntryGrade9: IIf([Current Grade Level] In (["09","10',"11","12"]) And IsNull([Date of Entry Grade 9]),"Date of Entry Grade 9 - Null Error",IIf([Current Grade Level]<>["09","10","11","12"] And Not (IsNull([Date of Entry Grade 9])),"Date of Entry...