dtpcreceive: 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/dtpcreceive - from package: ion

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

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