Hi,
I have come across a problem where if you have an AutoCAD (dwg) drawing which already has another file (i.e. dwg) linked in. Please note the dwg is overlaid not attached. Then Revit automatically links both files into the model and not just the file you linked.
So what I am proposing is that when you linked any dwg's into a Revit model it will disregard any other linked dwg which is overlaid into the file (dwg) being linked into the Revit model. The same way AutoCAD does when if you overlaid a drawing.
Thanks
Gareth