po_createref: 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/po_createref - from package: polyorb-servers

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

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