dcm_map_to_8: 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_map_to_8 - from package: ctn

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

Error in other languages:
dcm_map_to_8: bevel nie gevind nie
dcm_map_to_8: comandă negăsită
dcm_map_to_8: comando não encontrado
dcm_map_to_8: commande introuvable
dcm_map_to_8: command not found
dcm_map_to_8: käsku ei ole
dcm_map_to_8: không tìm thấy lệnh
dcm_map_to_8: komanda nerasta
dcm_map_to_8: Kommando nicht gefunden.
dcm_map_to_8: kommandot finns inte
dcm_map_to_8: komut yok
dcm_map_to_8: nie znaleziono polecenia
dcm_map_to_8: níor aimsíodh an t-ordú
dcm_map_to_8: no se encontró la orden
dcm_map_to_8: no s'ha trobat l'ordre
dcm_map_to_8: opdracht niet gevonden
dcm_map_to_8: parancs nem található
dcm_map_to_8: perintah tidak ditemukan
dcm_map_to_8: príkaz nenájdený
dcm_map_to_8: příkaz nenalezen
dcm_map_to_8: команда не найдена
dcm_map_to_8: командата не е открита
dcm_map_to_8: 命令找不到
dcm_map_to_8: コマンドが見つかりません