I'm not at a BIAB computer to check, but I know BIAB uses the key signature to make enharmonic decisions. Try changing the key of the original song to E instead of C and perhaps it will work. [Your tenor part should read F#]


BIAB 2024 Win Audiophile. Software: Studio One 6.5 Pro, Swam horns, Acoustica-7, Notion 6; Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors