Allanah, I think you should definitely report this to Support.
The error message is so odd that it is probably part of a debug statement that is not supposed to occur, yet it has.
What version of RB?


BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones