Cannot Save Articulate Storyline

I just ran into this problem, and luckily I had recently saved so I wasn't freaking out, which kept me calm and I ended up being able to save it. This error happened when I was trying to save while I was opening Photoshop. How I got it to save was to make some more changes, closed photoshop, previewed a couple of slides and then clicked save again. Just FYI in case anyone else gets this error. Happy New Year to all. 
~Jeff