Copy and replace old blocks

[andreas7ZYXQ]

Hi

Is there someone that could help me with a lisp routine.

I have a drawing that contain blocks(symbols) in multiple locations inside a drawing. Sometime a few hundred.
I would like to click at one of those (old) blocks and replace it wit the new one. 

So, simply chose old block to replace and then chose the new block. (then its copied to the same insertion pont of all verisions of that block inside the drawing.) Im thinking of copying beacuse the replacement block is scaled differently some times.

[pendean]

There are many such LISP routines posted in these forums and on the web: what have you found so far that did not work as you wished?

For example https://forums.autodesk.com/t5/visual-lisp-autolisp-and-general/find-and-replace-group-of-blocks-tha...

and https://www.youtube.com/watch?v=-47I1bhph1c 

[paullimapa]

https://help.autodesk.com/view/ACD/2024/ENU/?guid=GUID-575DBF52-31A3-47C5-9F19-C66854BB2214