csound_extract: 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/csound_extract - from package: csound-utils

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

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