dot_builtins: 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/dot_builtins - from package: graphviz

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

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