Operation has failed error?

I’m trying to burn an audio montage of three 24/96 files to DVD-A. the files take up about 4GB. I click the question mark, and it tells me the DVD-A is ready. I click burn, it renders the audio. Then I try to burn to disk, and I get an Operation Has Failed error, with no explanation for why. I get the same error trying to burn it to image. Any ideas?