dcm_vr_patterns: 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_vr_patterns - from package: ctn

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

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