Cannot Save Low Memory... About to have a heart attack....

I'm on 64 bit windows with 16g ram.

Have been working on this project all day and saving periodically - just added and entire scene that took a couple of hours to make and now I'm getting the error that the story cannot be saved?

I did have After Effects and Audition open in the background but I've closed both - attached is a picture of the memory usage... what gives?  How can I save this and not lose all this work?

Thank you.

EDIT... annnnd the program crashed... and my scene is gone.  Not once - ever - has an adobe product - ever - had this issue.  I can run Premier & After Effects and Captivate at the same time with no issues.  I've been forced to use Storyline because that's the decision the company I work for made.  

Now I'm terrified to rebuild this scene with the complexity I had added to it.  I'm also terrified to run it with anything else open - which is painfully inconvenient.

Please tell me there's an easy fix here - I'm reading other posts 4-5 years old with the same issue... how is this still a problem?