totalopenstation-gui: 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

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/totalopenstation-gui - from package: totalopenstation

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