Oh, that was embarrasing. :redface: I've edit my post above and changed it to 2.37.4 and also changed the name of the attached file.
In the program it says 2.36 though.
And yes, when I kept crashing I had the torodial stuff unchecked, Boyancy checked, pond mode checked, gravity set to .4.
I'm not sure about going over to 2.36 now. As I see it there is only one bug left to fix in 2.37.4; the run-time error 6 overflow.
I think it's the Pondmode or possibly the gravity that isn't working.