has anyone encountered the following problem: Certain elements are not appearing in model views (there doesn't seem to be a discernable pattern, i.e. all on a certain layer, floor, or type) and it's not because they are the only ones selected. This has happened to us a couple times but restarting the computer seemed to fix it. However, it has happened again and no amount of restarting or resting the computer seems to help. Any suggestions would be appreciated.
