po2xml: 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/po2xml - from package: kdesdk-utils

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

On Debian possible default full paths are:

/usr/bin/po2xml - from package: poxml

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

Error in other languages:
po2xml: bevel nie gevind nie
po2xml: comandă negăsită
po2xml: comando não encontrado
po2xml: commande introuvable
po2xml: command not found
po2xml: käsku ei ole
po2xml: không tìm thấy lệnh
po2xml: komanda nerasta
po2xml: Kommando nicht gefunden.
po2xml: kommandot finns inte
po2xml: komut yok
po2xml: nie znaleziono polecenia
po2xml: níor aimsíodh an t-ordú
po2xml: no se encontró la orden
po2xml: no s'ha trobat l'ordre
po2xml: opdracht niet gevonden
po2xml: parancs nem található
po2xml: perintah tidak ditemukan
po2xml: príkaz nenájdený
po2xml: příkaz nenalezen
po2xml: команда не найдена
po2xml: командата не е открита
po2xml: 命令找不到
po2xml: コマンドが見つかりません