I'm no expert, but it sounds like maybe you might have hard drive issues. I've had poser crash many, many times. It's even overheated my computer and shut it down. I've never seen it corrupt anything beyond the file that was open. I did have a lot of issues with corrupted poser files when my hard drive was going bad. Do you have any autosave files for these scenes? You could check one of those.

---

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