xmlwf: 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 CentOS possible default full paths are:

/usr/bin/xmlwf - from package: expat

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/xmlwf - from package: expat

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

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