AsaHerring

I'm not looking for a bandaid fix. And rendering it to another format then converting it to .mp4 will significantly reduce quality and will add more steps and take more time.

I did say in the post that I uninstalled it and reinstalled it.

I have also downloaded Vegas Pro 12 and it will not render to .mp4 either.

This may not be the best place to ask this, one of the only forums I have an account on, but I believe it's relevant. I have had Sony Vegas 10 for several years now, 3-4, and used it 9-10 over those years. I just recently started a let'splay/gaming channel on YouTube and I've been using Sony Vegas 10 to edit and render my videos to .mp4. I have made 35-40 videos over the past several weeks and have had no problems. Until all of a sudden, every time I render to .mp4, it gives me the "unexpected error occurred" pop up. It only does this when rendering to .mp4, nothing else. I have a couple hundred gigs left on my hard drive, so I know that's not it. Since I'm using Sony Vegas 10, there is no render with GPU option, so it is not that. It normally runs into this problem somewhere between 75%-99% render completion, not at 1%. My videos normally take 1-2 hours to render, so it's insanely frustrating to re render it, and again it fails. I have changed absolutely nothing, no settings have changed, did not even change my project or render settings. I have also cleared the cache which did nothing, I've uninstalled it and deleted all files associated with it, nothing. Opening another window and copying the tracks over does not work. If I render to .wmv and try to re render that video to .mp4 it still fails. This has come out of no where and I have no clue what to do. I am asking here becuase researching the problem has not helped. I have no clue what to do.