Model disappearing in 3D (please help a lost third year student with a deadline on Monday D:)

[ellie.1997]

Hi,

I have various models on vector works that I can see absolutely fine in 2D Plan view.

However, when I try to use flyover/camera views and anything looking at the model in 3D, it completely disappears. Yet when I hover my mouse over where the model is meant to be, it is highlighting the invisible object still. Further, when I create a viewpoint to a sheet, this view then becomes visible,

It's not an individual file problem either because it is happening to all my documents and new files I create. So it can't be a class issue either? 

Has anyone had this problem? Desperately need help- working towards my third year deadline on Monday!

Thanks

[PVA - Admin]

Reply with the following attached from your machine:

This sounds like it might be a graphics issue and easily fixable.