xmlrpc: 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/xmlrpc - from package: xmlrpc-c-apps

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

On Debian possible default full paths are:

/usr/bin/xmlrpc - from package: libxmlrpc-core-c3-dev

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

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