1. Note a family in the linked project that has the shared parameter you are hoping to schedule.
2. Close the linked file.
3. Open a new test project into which the previously opened Revit file has to be linked
4. Link the previously opened project
5. Find a view and use tab to select the family in the link containing the shared parameter
6. Now delete the pasted family to avoid overlap
7. Check the box for “Include Elements in Links” in the schedule
8. Select the shared parameter which now appears in the fields