Solved Vegas Pro 13 crashes or hangs during rendering

I have now done several multi-hour renders in Pro 13 and no crashes or hangs. And

- I used ex-MSP12 .vf files
- I used ex-MSP12 render templates

So it looks like the problem was that global config for using CPU only, or GPU acceleration. I have set it to CPU only. Rendering takes about 3x slower than real time if going 1080P to 768P, 50mbits/sec.

I wonder if those FX which need GPU e.g. NB Titler EX and Pro are going to crash of I use them?

Got this from Magix:

Turning off GPU accelerated video processing in Vegas does not remove it from
the entire system.  The GPU is still available on the system or effects which
utilize it, such as New Blue effects and applications.  Those will still work
for you even if GPU is disabled in Vegas.