Is there any chance that you have an audio file (.mps, .wav etc ) by the same file name in the same folder as the BIAB song file (.sgu, .mgu)?

If so, rename the audio file start the program again and see if the issue remains.


BIAB & RB2026 Win.(Audiophile), Windows 10 Pro & Windows 11, Cakewalk Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Session Keys Grand S & Electric R, Kontakt, Focusrite 18i20, KetronSD2, NS40M, Pioneer Active Monitors.