lss16toppm: 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 CentOS possible default full paths are:

/usr/bin/lss16toppm - from package: syslinux-perl

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/lss16toppm - from package: syslinux-utils

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

Error in other languages:
lss16toppm: bevel nie gevind nie
lss16toppm: comandă negăsită
lss16toppm: comando não encontrado
lss16toppm: commande introuvable
lss16toppm: command not found
lss16toppm: käsku ei ole
lss16toppm: không tìm thấy lệnh
lss16toppm: komanda nerasta
lss16toppm: Kommando nicht gefunden.
lss16toppm: kommandot finns inte
lss16toppm: komut yok
lss16toppm: nie znaleziono polecenia
lss16toppm: níor aimsíodh an t-ordú
lss16toppm: no se encontró la orden
lss16toppm: no s'ha trobat l'ordre
lss16toppm: opdracht niet gevonden
lss16toppm: parancs nem található
lss16toppm: perintah tidak ditemukan
lss16toppm: príkaz nenájdený
lss16toppm: příkaz nenalezen
lss16toppm: команда не найдена
lss16toppm: командата не е открита
lss16toppm: 命令找不到
lss16toppm: コマンドが見つかりません