dcm_dump_compressed: 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_compressed - from package: ctn

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

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