yodl2xml: 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/yodl2xml - from package: yodl

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

Error in other languages:
yodl2xml: bevel nie gevind nie
yodl2xml: comandă negăsită
yodl2xml: comando não encontrado
yodl2xml: commande introuvable
yodl2xml: command not found
yodl2xml: käsku ei ole
yodl2xml: không tìm thấy lệnh
yodl2xml: komanda nerasta
yodl2xml: Kommando nicht gefunden.
yodl2xml: kommandot finns inte
yodl2xml: komut yok
yodl2xml: nie znaleziono polecenia
yodl2xml: níor aimsíodh an t-ordú
yodl2xml: no se encontró la orden
yodl2xml: no s'ha trobat l'ordre
yodl2xml: opdracht niet gevonden
yodl2xml: parancs nem található
yodl2xml: perintah tidak ditemukan
yodl2xml: príkaz nenájdený
yodl2xml: příkaz nenalezen
yodl2xml: команда не найдена
yodl2xml: командата не е открита
yodl2xml: 命令找不到
yodl2xml: コマンドが見つかりません