Fdata: 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/Fdata - from package: ferret-vis

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

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