Assuming the error message appears when you view the 3D model as well you can view it storey by storey.
If no message try another storey.
As soon as you get the mesage place a marquee around half of that storey and view that in 3D.
If no message you know it is in the other half if there is a message you know it is in the current half.
Now marquee half again of the area you know is generating the message and now view that in 3D.
Keep going until you get down to an area that is small enough to starte selecting single windows or curtain walls to see if they trigger the message.
Basically just keep narrowing down your search by marqueeing areas, isolating single storeys and even turn off layers.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11