fmscan: 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/fmscan - from package: fmtools

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

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