Lead Actor Swapper script error

[Ace_V]

Hi! I tried implementing the Lead Actor Swapper script by Sheol:
https://www.save-point.org/showthread.php?tid=6559


But when I tried swapping a character out using the Q button (L on a gamepad), I encounter an error on line 64:

Code:

      $game_system.lead_actor = ($game_system.lead_actor - 1) % $game_party.actors.size

I use a caterpillar script, could that be the problem? I was hoping I could swap/change character's party positions using the script and they would also swap on the caterpillar.