tcmp3cut: 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/tcmp3cut - from package: transcode

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

Error in other languages:
tcmp3cut: bevel nie gevind nie
tcmp3cut: comandă negăsită
tcmp3cut: comando não encontrado
tcmp3cut: commande introuvable
tcmp3cut: command not found
tcmp3cut: käsku ei ole
tcmp3cut: không tìm thấy lệnh
tcmp3cut: komanda nerasta
tcmp3cut: Kommando nicht gefunden.
tcmp3cut: kommandot finns inte
tcmp3cut: komut yok
tcmp3cut: nie znaleziono polecenia
tcmp3cut: níor aimsíodh an t-ordú
tcmp3cut: no se encontró la orden
tcmp3cut: no s'ha trobat l'ordre
tcmp3cut: opdracht niet gevonden
tcmp3cut: parancs nem található
tcmp3cut: perintah tidak ditemukan
tcmp3cut: príkaz nenájdený
tcmp3cut: příkaz nenalezen
tcmp3cut: команда не найдена
tcmp3cut: командата не е открита
tcmp3cut: 命令找不到
tcmp3cut: コマンドが見つかりません