NOTATIO

I have named it Abc or Xyz (so that I can easily find them), and they are found in all other applications. I am not in the studio now, but when I return I can post it as an example that you can test.

OCTO, but what name have you given your font _internally_? Specifically, I'm looking for "Font Name", "Family Name", and "Full Name", as found in the "PS Names" tab of the "Font Information window. Maybe you could send me the file and I could just take a look at it...

Hello.
Here it is. The font file and the FontForge file.
I installed this font into my Library Font folder. Finale cannot see it.

Hmmm... I looked at your file and I couldn't see anything obvious that would be causing Finale to not see it. The only thing that I wondered about is the code point of most of your glyphs. Does Finale have full unicode support? Even if it doesn't, I don't know why that would cause problems. It would only see the glyphs at "=" and "A". Which OS are you running this on?

This file is a test. Finale since version 2012 supports Unicode. The problem is even if I have only slots a-z including the space and the result is the same. SOMETIMES I get it functioning but I am unsure what was the reason for it.