Step1. Open qryCoursesSectionsAndAllFacultySummer18.
Step2. Save it as qryCoursesSectionsAndAlFacultySemesterParameter.
Step3. Switch to Design View.
Step4. Change the criteria for the SemesterYear field to:
[Enter the SemesterYear] Or is Null
Step5. Save and test the query.
Step6. Close the query.