deeb:
Nothing wrong there; I copy/pasted it to a file and it loads fine for me. By any chance does it work correctly with a different .reascale? (There are some here if you need:
https://stash.reaper.fm/browse.php?q=...=th&o=nd&pp=24 )
xinky:
Does it specify a line number along with that message? Something like:
...ing\REAPER\Scripts\Lokasenna\Lokasenna_Theory Helper.lua:1397: attempt to index a nil value (field '?')
slipstick:
It's always included chords, but I'll put an option to ignore them on my idea list.
What I'm gathering from all this, and my testing just now, is that Theory Helper has a lot of bugs and could use some love. I'll see what I can do.