Originally Posted by Bob Calver
Do you mean preserving the old project with tracks as already generated and then editing it? Try opening the file in RB and see what happens. Or dropping and dragging into RB. Then you can re-open in BIAB if you save as a BIAB file. Or this may not be what you want to do at all! If you drop the wave files into RB see what happens. Get back to the forum if this is not what you wanted.

Bob, preserving the old tracks except the multidrum track. It's the multidrum track that's causing the problem with the realdrums with stems. I don't think dropping it into RB will change anything.
When rendering the stems to WAV, etc.
There is no audio waveform, only an empty audio file.

The workaround is to avoid using styles that contain multidrums. Unfortunatly with the old song I'd already used a style with multidrums before I'd found out about the workaround.

Windows 10, Band in a box 2024, Build 1114.