dcmmklut: 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/dcmmklut - from package: dcmtk

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

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