I think I understand. First, does iso mean in search of? As in, you were expecting Ab but got the enharmonic equivalent G#?

Couple of thoughts.

Problems like this often (but not always) go away when you set the correct key signature in your BIAB song. Many people just leave it at the default key of C. I have trained myself to do that first when entering a song.

Assuming the melody note you want to change is MIDI, you can change the enharmonic name of a single note, usually, in the Editable Notation Mode. Right click and you’ll see a pull-down for the pitch. I’m not at a computer right now …. Last I checked, some choices were not supported, like Cb for B.
EDIT: it’s to the right, called Force Accidental. Change the note from Eb to D and Force Accidental to #

Also, just so I’m clear when reading your posts, are you in a country that uses B for what I call Bb, and H for B natural? Something like that. John Ford taught me that.

Last edited by Matt Finley; 03/20/25 04:42 AM.
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.