dciodvfy: 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/dciodvfy - from package: dicom3tools

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

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