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Re: Drawing Cleanup Lisp
The AectoACAD command does what you want also - even appends the file name with acad at the beginning, but skips the dxf process so that more items are able to live on with their current format. It simply kills off all of the aec objects. Our company standard for cleaning up files received from an architect/client is to run this first, as it helps keep our files tidy. I would think a script written around that command would be the simplest way to get from point A to point B.
"I think I fish, in part, because it's an anti-social, bohemian business that, when gone about properly, puts you forever outside the mainstream culture without actually landing you in an institution." - John Gierach