dcm_dump_file: 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/dcm_dump_file - from package: ctn

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

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