zpipe: 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/zpipe - from package: opencaster

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

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