I've got a video in 5.1 surround sound, that contains swearing, which I bleeped out following this. However, when I attempt to export the audio as an uncompressed WAV file in 5.1, I get an "Unknown Error". It works fine when exporting as stereo.

I'm assuming this has something to do with the bars and tone being in stereo, since I've had no problem exporting other projects with which I've used the same process previously.

The 5.1 file is an M2TS file captured via the Hauppage PVR.