Haven't coded in a long time and I need help figuring this out. I'm trying to list 3000+ audio files

* /sline: insufficient parameters (line 38, tunez.ini)
line 38 below

alias -l high_c { $iif($window(@tunez),sline @tunez %tunez.l) }

I think you missed a number

/sline in a custom window selects the specified line.

See /help /aline and look down 5 lines

Please note that I tried to make an @Window of my music, and while I don't remember how many files the @window did hold, I'm quite sure it was well under the 3000 mark.
By adding files/lines to the @Window that exceed the limit of the window, the top line(s) get lost.