In the following 2013 file: https://dl.dropbox.com/u/7117445/tem...%26Filters.rvt

...if you turn off the visibility of the 'Assembly_One' filter in the 3D view, both the 'wall' and the 'assembly' should turn off.

The value for the 'test' parameter is 'Assembly_One' for both the wall and assembly.

The assembly is assigned to the Walls 'Naming Category'.

Any clues to why this assembly is not turning off?

Kind Regards, Ryan