Hi guys
I'm getting the following message when trying to generate a real drum track in Real Band:

"beat map stretcher was unable to load in the wav file"

It's happening with just a couple of real drums tracks, as far as I can see (folk shaker tracks).
Everything else seems to work ok. I tried to re-start, re-boot, re-everything. It just keeps happening with the same real drums tracks.
I have the latest version of Real Band (Audiophile edition), with the latest update, windows 7, 64 bit, fast computer with plenty of hard drive space and ram.

I couldn't find much help in the forum. Just a very old thread (2009) but no real suggestion. Any idea?

Thank you