mkxmltype: 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/mkxmltype - from package: libxml-dt-perl

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

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