Until recently I had no problems exporting whole arrangements or just individual RealTracks as wav files. Now suddenly I can't seem to, leaving all my great ideas trapped inside the software. I'd be grateful for any help please!

Background: I've been doing a lot of work with a project, keying in a lot of chords, getting the arrangement just so, auditioning different RealTracks, and rendering them as individual files. Note that this file also has an audio file imported via the Audio menu (not the File menu); this file is monitored only, and plays no part in any instructions to BIAB (no chord wizard or anything like that is used on it; it just plays in the background, with levels controlled in the mixer.).

For a while everything was going great. Sometimes I'd render individual RealTracks straight from BIAB, using drag and drop. Other times using the Export song as wav file command from BIAB's File menu, aiming to export just the track of interest by first muting all the other tracks.

Well, today I opened up my latest version of this project and can't render any more.

Now, drag and Drop is causing BIAB to crash before the amber shading in "WAV" cell of the 4-cell drag/drop area even has a chance to turn green. I get a windows "application not responding" message, and have to close from that.

Also now, When I try File / Export song as wav file, BIAB acts like it's rendering, but I just get big (80 mb) wave files which are silent.

These happen even after I reboot my PC, disconnect from the internet and disable antivirus.

(This is the subject of another post, but I seem truly trapped, as I can't use RealBand to do this either. When I open the project in RealBand, as I've done in the past, and specify a new Realtrack (either over an existing Realtrack, or in a blank audio track), and click OK to generate, I now am getting this message: "Wave instructions to wavfile failed, likely due to failure in Beatmap stretcher."

Which is not very helpful, as I have not knowingly used the Beatmap strtecher, much less messed with it, asked for it, or even heard of it. The online help doesn't really enlighten.
Previoulsy this problem didn't arise, I could generate up to 7 new Realtrack multiriffs using this method; now I can't generate even a single basic RealTrack.)

Any help would be much appreciated. I've really enjoyed BIAB these past few years but if I can't get it to generate and export Realtrack performances as audio, I no longer see the point here.

http://www.youtube.com/watch?v=3tDj_VanH3g