mxmldoc: 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/mxmldoc - from package: libmxml-dev

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

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