dcod2lum: 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/dcod2lum - from package: dcmtk

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

Error in other languages:
dcod2lum: bevel nie gevind nie
dcod2lum: comandă negăsită
dcod2lum: comando não encontrado
dcod2lum: commande introuvable
dcod2lum: command not found
dcod2lum: käsku ei ole
dcod2lum: không tìm thấy lệnh
dcod2lum: komanda nerasta
dcod2lum: Kommando nicht gefunden.
dcod2lum: kommandot finns inte
dcod2lum: komut yok
dcod2lum: nie znaleziono polecenia
dcod2lum: níor aimsíodh an t-ordú
dcod2lum: no se encontró la orden
dcod2lum: no s'ha trobat l'ordre
dcod2lum: opdracht niet gevonden
dcod2lum: parancs nem található
dcod2lum: perintah tidak ditemukan
dcod2lum: príkaz nenájdený
dcod2lum: příkaz nenalezen
dcod2lum: команда не найдена
dcod2lum: командата не е открита
dcod2lum: 命令找不到
dcod2lum: コマンドが見つかりません