1. Open the report in Crystal Reports
  2. Go to Database > Database Expert
  3. Go to the Links tab
  4. Click Clear Links (click Yes to the next message that appears)
  5. Click Link (click Yes to the next message that appears)
  6. Change the Table Joins to Left Outer Join
  7. Click OK
  8. Repeat these steps for any subreports
  9. Save the changes to the report
  10. Preview the report through RE Custom Reports again