Often there will be a near-perfect interpretation of an arrangement, just a bar or two that has an odd guitar chord or drum punch. It would be great to highlight the bar and replace just that one phrase.
I know RealBand can sorta do this, but a quick-fix change would be very helpful and time-saving.
+1
This has been requested numerous times and it will hopefully be implemented some day. As you describe, selecting a section of bars and simply regenerating just that would be the ideal solution (and wouldn't require a 7-minute tutorial video to explain it!.
Charlie's work-around is a good one but it is a lot more complicated than I would like plus it has the undesirable side effect of requiring you to convert your bars to an audio file instead of staying with RealTracks.