I have a very similar problem, I discovered it only today when I tried to build a new project. I'm not sure what caused it, it could have been the update, but know knows. My older projects load, but then the program does something in the background and then suddenly dies without warning or error message. The windows goes unresponsive for a second and then it's gone.

Now the strange thing is this: dropping small clips on the timeline in the freshly open project works fine. Longer video clips cause trouble. In few seconds after the drop something kills the program in a very brutal way. Vegas obviously does some stuff in the background, and one of those background threads has now become unhappy for some reason.

Looks like a memory problem, but it just can't be. Fist, nothing changed in my system since those beautiful days when Vegas worked. Still the same 8GB or RAM, still plenty of swap place on my 512 GB SSD drive. Besides, all other programs work, and I have some heavy stuff there, like Unity3D, iClone or HitFilm.

I wrote to the support with all the details. I hope they'll help to solve the mistery, but since I have the deadline for a project tomorrow and the program betrayed me, I'll need to switch to HitFilm probably. I really have to rely on my tools. And nobody can if a program left unattended for two weeks goes rouge.

Shame on me, because I'm using Vegas since version 8. And I love it for its fantastic interface.

Anyways, if anyone here has any non-obvious clues of what might be causing the strange death of Vegas, I'd be grateful. I've tried all I could think of, but after eliminating other possibilities, the usual suspects are: some new bug in Windows or some new bug in Vegas.

I ended up having to find a link to re-download my previous build (147) and using that version. Works fine as long as I don't update to the newest build .

@UnprofessionalMartin Are you on Win7?

@UnprofessionalMartin Are you on Win7?

Oh no. It's Windows 10.0.18363. 64-bit system.

A little update, because things got more interesting.

I tried to install and run previous version of Vegas Movie Studio. With Movie Studio 15 Platinum, the problem remains. Application crashes exactly the same way, when I try to build a project with long, heavy video files.

It could indicate that the problem is either with my system or that the boys from Vegas introduced some revolutionary changes to version 15 and 16 simultaneously.

I went one more step back and installed Vegas Movie Studio 14 Platinum (build 148).

And with that version everything works fine! Stable as rock, no matter how many files I drop on the timeline. Good old Vegas that we love.

What does that mean? Clearly there must be some bug only in Vegas 15 and 16 that causes this critical problem. The bug woke up recently on my system. I wish I knew what caused the awakening.

So I recommend to move back to Vegas 14 until they fix it, even if you don't have problems with 15 or 16 yet. A bug like that is a huge risk for any serious work. Apparently it activates only in certain circumstances. But who knows what they are...

Don't end it here UnprofessionalMartin , you need to tell us what videos are you using,

mts's? mov's? avc's?.....

I use Windows 7, 64-bit. My video clips are .MTS

Then probably this is due to growing incompatibility for Windows 7. Your only chances may be installing the build before 167, upgrading the OS to Windows 10 or transcoding the clips before import.

@UnprofessionalMartin is on Win10 so his problem is something different to @kim-mayberry who is using Win7.

Martin, you gave us your Win10 build but what is your Version number? Did you recently have Feature update to Version 1909?

Ah, right. Yes, I have 1909 version installed.

The format of video files is AVC in MP4 container, 1920x1080 at 29.970 fps, baseline. Nothing special here, right from the camera.

@UnprofessionalMartin How "long" are the clips that are causing your problem? Time and file size.