First, welcome to the forum. Harmonica or melodica?

You have good advice above.

BIAB does have a measure limit of 255. When you are ready to try it, be aware RealBand, the free sequencer provided with BIAB, reads BIAB files directly and does not have that limit.

You may have hit that 255 limit, but more likely you are just in the gray area and Floyd gave you the solution: enter a number for Bar at End of Chorus that is well beyond the default 32. You can always change it when you know the real length.

Tip: get the song form correct before entering anything in Melody or Harmony tracks, because it can be hard to adjust that later if you change the form.

I've worked in BIAB for well over twenty years and never used the 1st/2nd endings. What I do use, in addition to Edit Unfold, is the Tag function in Song Settings. By using a Tag, I've never come up against the 255 bar limit.

Take it slow, and ask us anything. We're here. You're not dense; this program has a steep learning curve because it is very powerful, which makes it worthwhile learning. And if we get stumped, know that you can contact PG Music Support - they are really exceptional.

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.