I think the DWG as some thing like that. I will find out.

Check your reply next week.
>I know vert little about Autocad, but I have a client that needs to determine when a revision was made in a drawing.
>
>Is there any way to track revisions in an autocad file? IOW, when a drawing is modified and saved, is that information stored any where?
>
>If you had to make that determination, how would you do it?