Thanks for your reply Jeff.

I was referring to the option (at any bar) in BIAB to change the tempo either by a percentage or by simply typing the tempo you want.

I actually solved my above problem by first rendering all of my BIAB tracks to wave files. Then opening the song in RealBand file and deleting all of the band in a box tracks. Then I imported all the wave files. From there it rendered fine.

Thanks again,