dvdwizard_test: 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/dvdwizard_test - from package: dvdwizard

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

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