hmt-slam-gui: 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/hmt-slam-gui - from package: mrpt-apps

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

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