latticegen: 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
/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/latticegen - from package: fplll-tools

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