po_gnatdist: 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_gnatdist - from package: libpolyorb3-dev

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

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