"The song is really long and as it is it barely fits in the 255 measure BIAB limit even with the repeat." isn't information I had when I answered your question. Regardless, the answer to your question remains the same to how to get it to mute at bar 9 after it repeats. Remove the repeat.

I know that doesn't solve your issue. There was a long discussion last year about the 255 bar limit. The 255 bar limit is finite in both BIAB and RealBand since it has to do with the two programs sharing BIAB generating audio.

The simple answer is to render your song in sections of audio that are shorter than the 255 bar limit and assemble your audio clips in any DAW or audio editing program. There are no limitations doing it that way. If you have a Windows version of BIAB it has RealBand included and it is easy to assign markers to designate and separate your song to generate the sections and render and assemble the various sections into one continuous audio file.

BIAB 2025:RB 2025, Latest builds: Dell Optiplex 7040 Desktop; Windows-10-64 bit, Intel Core i7-6700 3.4GHz CPU and 16 GB Ram Memory.