tulip_perspective: 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/tulip_perspective - from package: tulip

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

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