Hi Gordon. I loaded that Music XML file into Presonus Notion 6 and it looks good to me, both rests and pickups, and plays fine. That means, if you agree, you should send this case to support@pgmusic.com and reference this thread because it's likely a BIAB issue interpreting the code.

Here is the file as Notion loaded it, printed to PDF: https://www.mattfinley.com/promos/Camaleon.pdf

You know this, I'm sure, but Music XML is a standard that isn't always implemented correctly for export and/or import in all programs that claim to support it. I've found Notion to be reasonably good. In fact, if I were to try exporting the file FROM Notion, perhaps the code generated would work better in BIAB; you never know. Ironically, MuseScore is one of the better tools to read DEFECTIVE Music XML code, since it at least gives you an error (like an old coding interpreter such as Basic language), rather than simply crashing on the import with no clue.

If you like, I could do more tests, and look at the actual code (it's easy to read).

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.