pdreceive: 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/pdreceive - from package: puredata-utils

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

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