Hello Swamp,
I'm hoping that posting to this old thread helps with the explanation better than I could by starting a new thread.
I have a situation similar to the OP's.
I have created blocks in several master drawings for tool palettes use.
I want to change the convention of the blocks names.
I have, for example:
ISORED90_L1
ISORED90_L2
ISORED90_L3
etc., etc.
I want to change not only the names, but the case of part of the name,
for example:
iso90RED_L1
iso90RED_L2
iso90RED_L3
etc., etc.
I tried the lisp routines without success. It may be my ignorance of the first user entry "Block name pattern:". I don't know what is required there.
Also, I tried the AutoCAD rename with wild cards and all I was able to accomplish was adding my entry to the block name.
Perhaps someone could clear this up for me.
thanks,