cdfwflx: 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/cdfwflx - from package: cdftools

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

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