fmcs: 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/fmcs - from package: python-fmcs

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

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