dpm-rfiod: 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/sbin/dpm-rfiod - from package: dpm-rfio-server
/usr/lib/debug/usr/sbin/dpm-rfiod - from package: lcgdm-dbg

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

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