sfactor: 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

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/sfactor - from package: xmlbeans

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