I want to add an Atoa Custom Battle System command cut-in.

[zlsl]

There are a number of scripts that actually define the party_size value within Game_Party.  These usually involve the increase of the size of the party beyond the default four maximum.  The inclusion of $game_party.party_size is meant to take advantage of this feature... by OTHER scripts. The size of the party isn't defined by zlsl's Battle Portraits.

I have used this type of system in other scripts that affect the battle system, one such system being AnimBat!.  This way, it can use a large-party script that lets you have 8 beroes in your party and AnimBat! can adapt.  However, if no large party script is in use, the 'party_size' value defaults to nil and assumes the default party size. limit.

I just neglected to put a very simple Game_Party class block within the script.... until now.

Check the thread again.  

Wow.
Thanks for the bug! I thank you so much for making the script !! It's a pity to simply express it in words! 
I was impressed because everyone is helping me so much. Have a nice day!

Is it correct to write a reply like this? I have read the rules of the forum, but please feel free to tell me if I made a mistake !!

[DerVVulfman]

Nope! You're fine. It happens quite often.