Many people used to ask me " I know how to take BOM using attribute extraction in AutoCAD. But how to update it without any lisp or running the same again." Here is my favorite.... I started with some piping connection. Here I calculated the BOM for Fittings and accessories in the pipe network. Tool: Autocad 2015 Commands: Attdef, Block, Line, Eattext, -Eattext, Action Recorder