po_catref: 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_catref - from package: polyorb-servers

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

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