xmlformat: 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/xmlformat - from package: xmlformat-perl
/usr/bin/xmlformat - from package: xmlformat-ruby

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

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