Autodesk Revit MEP

[#1]

I have an architectural model (with rooms placed and tagged) (revit 2012).

I link this model into my project, but I can not tag the rooms.

When I turn on room fill nothing shows up.

Any idea what the issue may be?

[#2]

Two possibilities:

1. The Rooms Category is turned off in V/G Overrides. Also check to make sure the Link's V/G's are not overridden under the Links tab.

2. The Cut Plane, under View Range, may be set to 0' - 0". If the Cut Plan does not cut through a Room, that Room will not be visible.

[#3]

It was a stupid mistake. The phases were not mapped properly.