Why won't DBpoweramp convert mp4 video file?

[Bluesunday]

All I get is: Error converting to Audio Extract (WAVE)

I was successful in converting to WMP file but would like to know why I can't convert to WAVE.

Thank you.

[Spoon]

What type of file are you converting? Any more error message is shown?

[Bluesunday]

Trying to convert MP4 file.

[Spoon]

Please upload one of your files to dropbox and personal message me the shared link.