I'm trying to export 5.1 surround sound in wav (lossless) but Premiere Pro CS6 isn't letting me. The audio file I have is 5.1. On some projects the 5.1 wav export works fine and others I can't export. I'm getting this error: Adobe Media Encoder: "Error compiling movie. Unknown error." Can someone help me? I could export for 1 minute but the the full 2 hours.