Scene won't save but I have lots of space on the disk

[Kittenscute]

Earlier this month I was making a Marble race. But however, once when I was gonna save it, I just got a bad error.

Spoiler: show

Out Of Memory! Save your scene as .phn if you can't save it as .phz and restart Algodoo!

I got MAD
I don't get it. How do you even save it as .phn?

Can someone help? I would be happy.

I'm also a beginner.