dcm_add_fragments: 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_add_fragments - from package: ctn

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

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