Get room data for elements in RVT links

A Revit guru asked:

“Have you ever shared room data across Revit links successfully? If you have 10 linked projects from different authors / disciplines, and the official room data only exists in one of them (say architectural), have you figured out a way to create a cross discipline room schedule?”

For example, your walls & rooms are in rooms.rvt. Furniture is in furniture.rvt which is linked into rooms.rvt. How do you figure out the room for each piece of furniture?

With the API, of course!

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Sometimes its not your code (try a different Revit version)

An API developer asked why this code didn’t work to place a face-based family instance on a face in an RVT Link.

public void PlaceFaceBasedFamilyinLink()
{
    UIDocument uidoc = this.ActiveUIDocument;
    Document doc = uidoc.Document;
    
    ReferenceIntersector ri = new ReferenceIntersector((View3D)doc.ActiveView);
    ri.FindReferencesInRevitLinks = true;
    Reference r = ri.FindNearest(XYZ.Zero,XYZ.BasisZ.Negate()).GetReference();

    Family fam = new FilteredElementCollector(doc).OfClass(typeof(Family)).Cast<Family>().FirstOrDefault(q => q.Name == "Family2");
    
    using (Transaction t = new Transaction(doc,"place instance"))
    {
        t.Start();
        doc.Create.NewFamilyInstance(r, r.GlobalPoint, XYZ.BasisY, fam.Symbols.Cast<FamilySymbol>().First());
        t.Commit();
    }        
}

After investigating for a while in 2014 and wondering why this error occurred:

Capture

I decided to try the same codeĀ in 2015 where I found it to work just fine. This doesn’t help me get it working if I need a Revit 2014 solution, but at least it lets me stop spendingĀ time looking for a problem in my code that doesn’t exist.