Can't really figure out what you are doing. You can't " record audio, in 2 tracks that are set to use RTs...". RT's are already audio and you can only record Audio to 1 track at a time. Have you recorded audio in BIAB before and it is only now causing an error? What version are you using and is it upto date with fixes?

First thing you have to do when ever BIAB does not do what you expect it to, is Return to Factory Setting. This corrects many errors.


BIAB – 2025, Reaper (current), i7-12700F Processor, 32GB DDR4-3200MHz RAM, Motu Audio Express 6x6 - My SoundCloud (Tip: No need to create a SC account to hear music - just hit ESC ).