xml.py.mako: 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/lib/python2.7/dist-packages/vistrails/db/bin/templates/xml.py.mako - from package: vistrails

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

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