pp64: 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/pp64 - from package: polylib-utils

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

Error in other languages:
pp64: bevel nie gevind nie
pp64: comandă negăsită
pp64: comando não encontrado
pp64: commande introuvable
pp64: command not found
pp64: käsku ei ole
pp64: không tìm thấy lệnh
pp64: komanda nerasta
pp64: Kommando nicht gefunden.
pp64: kommandot finns inte
pp64: komut yok
pp64: nie znaleziono polecenia
pp64: níor aimsíodh an t-ordú
pp64: no se encontró la orden
pp64: no s'ha trobat l'ordre
pp64: opdracht niet gevonden
pp64: parancs nem található
pp64: perintah tidak ditemukan
pp64: príkaz nenájdený
pp64: příkaz nenalezen
pp64: команда не найдена
pp64: командата не е открита
pp64: 命令找不到
pp64: コマンドが見つかりません