Hello there! I'm using Magix Vegas Pro 15, and have bought it a few days ago. I have a decent ram at 6gb, and a decent graphics card (Nvidia gtx 1060), and I have recently encountered an issue that occurs when I export, it randomly (always in the last third of the video though), "cuts off". After it's exported, if opened in a video player, if you watch to a certain point, it just stops and turns black. If you try to scroll the play-bar through the point of the "cut", it just jumps back.
If you need more information, ask me, and I can provide it. Also, I can record how it looks in the video player if needed.
Also, I've tried a lot of different export options, and it always "cuts" at around 40 minutes. (of a 46 minute clip)