cdfnrjcomp: 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/cdfnrjcomp - from package: cdftools

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

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