buildapp: 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/buildapp - from package: buildapp

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

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