I find that Vegas 14 Build 211 is very unstable when multi-cam mixing, it often crashes (13 was not any better). Also, I am unable to reliably render a simple project in Vegas, it often crashes mid-way through a big render.
I have a NVIDIA GeForce GTX 1070 card in a brand new computer with i7 6700 CPU and 16 gb RAM.
I have discovered a work-around for now: disable GPU acceleration.
But of course, this means that rendering takes much longer, so this is not a solution. I filed a report with Magix, and the response was to make sure I have the latest build installed, which I do.
I have Googled this topic, and found that many others are experiencing the same problem.
Anybody else with this experience?