I am having this same problem with a 2 camera project. I am into it about 15 min and suddenly it’s freezing up and not even leaving the typical recoverable file when restarting, and also not self reporting to Sony about the problem.
I have solved most trouble before by updating video drivers, so did that but no benefit. I am on latest SVP 13 version, Windows 8.1, and my project isn’t complicated. Also tried renaming and resaving the file as it sits after reopening, no luck. Something is corrupted, can’t proceed. The only thing I can think of is to start over and hope.
Is anyone else experiencing this, relative to multicamera?