How to use $Year and $Length in format string?

[milnak]

(venv-beets) jeff@nuc:~$ beet list --format '"$title" on "$album" by $albumartist ($Length) ($Year)' albumartist:kenton
"Prologue" on "Kenton’s West Side Story" by Stan Kenton ($Length) ($Year)
"Something’s Coming" on "Kenton’s West Side Story" by Stan Kenton ($Length) ($Year)
"Maria" on "Kenton’s West Side Story" by Stan Kenton ($Length) ($Year)
"America" on "Kenton’s West Side Story" by Stan Kenton ($Length) ($Year)

What am I doing wrong here? I'd like the print length and year.

thanks!

[DjSlash]

Use lowercase.

[milnak]

I created #5834 to track.