xml2vdr: 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/xml2vdr - from package: dvbtune

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

Error in other languages:
xml2vdr: bevel nie gevind nie
xml2vdr: comandă negăsită
xml2vdr: comando não encontrado
xml2vdr: commande introuvable
xml2vdr: command not found
xml2vdr: käsku ei ole
xml2vdr: không tìm thấy lệnh
xml2vdr: komanda nerasta
xml2vdr: Kommando nicht gefunden.
xml2vdr: kommandot finns inte
xml2vdr: komut yok
xml2vdr: nie znaleziono polecenia
xml2vdr: níor aimsíodh an t-ordú
xml2vdr: no se encontró la orden
xml2vdr: no s'ha trobat l'ordre
xml2vdr: opdracht niet gevonden
xml2vdr: parancs nem található
xml2vdr: perintah tidak ditemukan
xml2vdr: príkaz nenájdený
xml2vdr: příkaz nenalezen
xml2vdr: команда не найдена
xml2vdr: командата не е открита
xml2vdr: 命令找不到
xml2vdr: コマンドが見つかりません