acpl-long: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/acpl-long - from package: scotch

You may install the required package with command apt-get install {package}

Error in other languages:
acpl-long: bevel nie gevind nie
acpl-long: comandă negăsită
acpl-long: comando não encontrado
acpl-long: commande introuvable
acpl-long: command not found
acpl-long: käsku ei ole
acpl-long: không tìm thấy lệnh
acpl-long: komanda nerasta
acpl-long: Kommando nicht gefunden.
acpl-long: kommandot finns inte
acpl-long: komut yok
acpl-long: nie znaleziono polecenia
acpl-long: níor aimsíodh an t-ordú
acpl-long: no se encontró la orden
acpl-long: no s'ha trobat l'ordre
acpl-long: opdracht niet gevonden
acpl-long: parancs nem található
acpl-long: perintah tidak ditemukan
acpl-long: príkaz nenájdený
acpl-long: příkaz nenalezen
acpl-long: команда не найдена
acpl-long: командата не е открита
acpl-long: 命令找不到
acpl-long: コマンドが見つかりません