stag-drawtree: 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/stag-drawtree - from package: libdata-stag-perl

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

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