This is usually an user or library error. Use the marquee to limit what you want to see in 3d to try and find the problem. Also without knowing more information it is difficult to diagnose the problem. It could be that you have too many polygons in your project, modeled site elevations at 3" increments or you have modeled half of France including the Pirenees. Also I am assuming that you have a good enough computer with Dual core processors, +4Gb ram, a 512Mb Graphic Card with the latest drivers, running AC12 with the latest patches.
Eduardo Rolón AIA NCARB
AC27 US/INT -> AC08Macbook Pro M1 Max 64GB ram, OS X 10.XX latest
another Moderator