Fpatch: 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/Fpatch - from package: ferret-vis

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

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