heat.lut: 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/lib/eso-midas/13SEP/systab/bin/heat.lut - from package: eso-midas

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