viewluts.aux: 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/viewluts.aux - from package: eso-midas

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