gnupod_convert_FLAC: 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/gnupod_convert_FLAC - from package: gnupod-tools

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

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