Why is only the place local PRP an option in Bentley Substation?

Question

I cannot seem to place a "Master" Project Reference Point in Bentley Substation because the radio button is un-selectable. 
 Why is only the place local PRP an option? I am in the master 3D file... I've tried deleting any existing PRPs and starting over. I've tried hitting clear...... And while on the subject of PRP's... Why is placing an "X" in a file such a arduous & confusing process? IDK.... But any help would be greatly appreciated, Thanks.

Matt_P · Answer

Hi Jeff. The software sure seems to think the master PRP is already placed. That's the only reason I've seen for why the Master radio button is not selectable. To find the page it thinks the master PRP is on, you could query the database. One way to do this is to create a new report template using Report Template Designer and choose Customized By SQL Statement on the New Report Template dialog. Then paste the following into the window below Customized By SQL Statement : 
 SELECT dbo.Description.name, dbo.Description.ownerId, dbo.Description.project_id, dbo.Page.name AS page, dbo.Page.fileName, dbo.Description.type
FROM dbo.Description INNER JOIN dbo.Page ON dbo.Description.ownerId = dbo.Page.id
WHERE (dbo.Description.name = 'MPRP') AND dbo.Description.type ='Page' AND (dbo.Description.project_id = @projectid) 
 Or you can use this query in SQL Server Management Studio. In that case you would need to replace "@projectid" with the actual Project.id value of the project, as seen in the first line of the ect.fid file . 
 Hopefully this will direct you to the page from which you need to delete the existing master PRP.