nevow-xmlgettext: 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/nevow-xmlgettext - from package: python-nevow

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

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