Script call throws error message

[Kes]

The following script call is a troop event.  I have given it line numbers just to make it easy for me to refer to each bit.  Obviously as a script call, it doesn't normally have them.  This script call is on a page set to turn 1 and every subsequent turn, and the span is Turn.

a=0$game_party.members.each{|actor| #if actor.state?(77) b=(actor.hp*5/100) actor.hp-=b a+=b #end}$game_troop.members[1].hp += aWhat I think is happening with this script call is this.

Line 1 - establishes that a has a zero value at the beginning.

Line 2 - establishes that what follows is for all actors who are currently in the battle party.

Line 3 - checks whether each actor has state 77 inflicted on them

Line 4 - establishes the value of b.  In this case it is equal to 5% of every actor's current HP

Line 5 - Each actor has HP to the value of b subtracted from their current HP

Line 6 - a is now given the value of b

Line 9 - An enemy (in this case the enemy with the troop ID of 1) is given HP to the new value of a

This action is in addition to the skills in the enemy's skill list.

State 77 is inflicted on all the party by an event command at turn 0.  I have checked that this works by giving the state a distinctive icon and it appears at that moment.  Dialogue which follows the state being inflicted runs as expected.

I choose the party's actions and at the end of that the game crashes with the following error message.

'Game_Interpret' line 1411: NoMethodError occurred

undefined method 'hp' for nil:NilClass

I cannot see what is wrong with the script call to produce that error.  Could anyone help me out please?

Thank you.

 

[Hudell]

Do you have two monsters on the enemy party?

On that last line of the script call, you're changing the HP of the second monster (index 1). It's the only thing I see that can cause a problem.

 

[Iavra]

Enable console and put this above the script:

p "Actors"p $game_party.membersp "Enemies"p $game_troop.members

 

[Ossra]

Yeah, like Hudell said, you probably need to change '$game_troop.members[1]' to '$game_troop.members[0]' if you only have one enemy.

 

[Kes]

That was it.  I keep forgetting that the index starts at 0.  When the last line was changed, everything went smoothly.

Thank you all so much.  I've been tearing my hair out over this.