cdfzonalout: 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/cdfzonalout - from package: cdftools

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

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