dpipe: 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/dpipe - from package: vde2

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

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