qliss3d: 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/qliss3d - from package: qliss3d

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

Error in other languages:
qliss3d: bevel nie gevind nie
qliss3d: comandă negăsită
qliss3d: comando não encontrado
qliss3d: commande introuvable
qliss3d: command not found
qliss3d: käsku ei ole
qliss3d: không tìm thấy lệnh
qliss3d: komanda nerasta
qliss3d: Kommando nicht gefunden.
qliss3d: kommandot finns inte
qliss3d: komut yok
qliss3d: nie znaleziono polecenia
qliss3d: níor aimsíodh an t-ordú
qliss3d: no se encontró la orden
qliss3d: no s'ha trobat l'ordre
qliss3d: opdracht niet gevonden
qliss3d: parancs nem található
qliss3d: perintah tidak ditemukan
qliss3d: príkaz nenájdený
qliss3d: příkaz nenalezen
qliss3d: команда не найдена
qliss3d: командата не е открита
qliss3d: 命令找不到
qliss3d: コマンドが見つかりません