dpidc: 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/dpidc - from package: dillo

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

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