It may be something's off with your preview settings. You can find those under render settings on the preview tab.

But most likely it is corrupted. You don't want to keep those files. You might be able to save the individual parts of the scene to your library though so you don't lose much work.

---

Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

Today I break my own personal record for the number of days for being alive.
Check out my store here or my free stuff here
I use Poser 13 and win 10