xml2pot: 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/xml2pot - from package: kdesdk-utils

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

On Debian possible default full paths are:

/usr/bin/xml2pot - from package: poxml

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

Error in other languages:
xml2pot: bevel nie gevind nie
xml2pot: comandă negăsită
xml2pot: comando não encontrado
xml2pot: commande introuvable
xml2pot: command not found
xml2pot: käsku ei ole
xml2pot: không tìm thấy lệnh
xml2pot: komanda nerasta
xml2pot: Kommando nicht gefunden.
xml2pot: kommandot finns inte
xml2pot: komut yok
xml2pot: nie znaleziono polecenia
xml2pot: níor aimsíodh an t-ordú
xml2pot: no se encontró la orden
xml2pot: no s'ha trobat l'ordre
xml2pot: opdracht niet gevonden
xml2pot: parancs nem található
xml2pot: perintah tidak ditemukan
xml2pot: príkaz nenájdený
xml2pot: příkaz nenalezen
xml2pot: команда не найдена
xml2pot: командата не е открита
xml2pot: 命令找不到
xml2pot: コマンドが見つかりません