I'm glad you pointing things out for me to understand. thanks much much:-)

@whale-av

"$0 can be used in any object as part of the name or the address, which means that a message cannot escape from the abstraction. A sub-patch like [pd my-subpatch] will be given the same number."

If I'm correctly following you, this quote from your post looks satisfying my need.?.?

Hey!, I've found my bug! thanks. I was using several duplicates of an abstraction that each one contains array 'A','B','C','D'.
But still in trouble of resolving this issue. how can I set each abstraction's arrays unique while creating multiple of this abstraction in a patch??

warning: D: multiply defined
warning: D: multiply defined
warning: C: multiply defined
warning: C: multiply defined
warning: B: multiply defined
warning: B: multiply defined
warning: A: multiply defined
warning: A: multiply defined
warning: D: multiply defined
warning: D: multiply defined
warning: C: multiply defined
warning: C: multiply defined
warning: B: multiply defined
warning: B: multiply defined
warning: A: multiply defined
warning: A: multiply defined

I was not troubled by this so far operating the patch of this, but still wondering what this is? Can this be resolved? Could this be causing a problem in the future?

@whale-av I meant, 'list-len'. But I looked up the extension 'list-abs' to settle this

@whale-av Thanks!, That resolved it.

@whale-av I noticed an error occurs on console, saying couldn't create 'list-something' or 'compare-any', 'import-disabled list abs'.
I'm using 0.48.1. Am I using the wrong PD?
What am I doing it wrong?

@LiamG Thanks! This is what I was looking for and much more. I think this will come handy in general.

while working on a generative music patch, I had a struggle that is creating a sequencer saves pattern which written during the session.
I could see how I can achieve this easily with wiring but can this be possible with click of a button as how toggle does, which also saves it for the next time??