cdfcofdis: command not found

Have You tried accessing the binary with the full path?

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/cdfcofdis - from package: cdftools

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