1. Right-click on the subreport and select Edit Subreport
  2. From the Field Explorer, insert the field you will link into the report (for example, add the CnBio_SortKey into the Details section of the subreport)
  3. Go back to the Design tab (main report)
  4. Right-click on the subreport and select Change Subreport Links
  5. Locate the CnBio_SortKey field on the left and click the right-arrow button
  6. Make sure the same CnBio_SortKey field is selected from the drop down in the bottom right
  7. Click OK
  8. Right-click on the subreport and select Edit Subreport
  9. Delete the CnBio_SortKey field from the Details section as it is no longer needed
  10. Go back to the Design tab (main report)
  11. Refresh the report (Report > Refresh Report Data)