Hi Noel,
Yes, I tried your set up and it worked okay. There doesn't seem to be a problem with rendering to an individual track in Real Band. The problem is in generating a stereo audio file (wav) on the hard disk or desktop. (as opposed to RB)

Turns out that almost everything works except that. Sorry if I confused you - I'm fighting a rather heavy case of bronchitis
the last couple of days and am not always thinking straight.

I believe I will drop a line to Support and let them know. There are plenty of workarounds for this one however.

Thanks again,
Jim