How to fix the error

[The chaser]

I don't see any Logic error here..But you have a Syntax Error.If you are using notepad++ go to line:21,Col:1 (Between AddUseItemCallback("", "key", "unlock", "unlockdoor", true); and void unlockdoor(string &in asItem, string &in asEntity) ) there you forgot to put a } !
I hope this is the only error.

wow that was it...

but he wont leave the room and disappear how can I fix that like make him gone for good.

oh and how do I put the game in debug mode?

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Makes sense Though i'd still like to know if there is more than just this.

nope thats it
all of it nothing taken out

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void OnStart()
{
AddEntityCollideCallback("Player", "brutey", "MonsterFunction", true, 1);
}
void MonsterFunction(string &in asParent, string &in asChild, int alState)
{
//SetEnemyDisableTriggers("Brute", true);
SetEntityActive("Brute", true);
AddEnemyPatrolNode("Brute", "PathNodeArea_1", 2, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_2", 0, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_3", 0, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_4", 0, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_5", 0, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_6", 0, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_7", 0, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_8", 0, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_9", 0, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_10", 0, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_11", 0, "");
AddEnemyPatrolNode("Brute", "PathNodeArea_12", 0, "");
AddUseItemCallback("", "key", "unlock", "unlockdoor", true);
}
void unlockdoor(string &in asItem, string &in asEntity)
{
SetSwingDoorLocked("unlock", false, true);
PlaySoundAtEntity("", "unlock_door.snt", "unlock", 0, false);
RemoveItem("key");
AddEntityCollideCallback("Brute", "brute_go", "Monsterdisappear", true, 1);
}
void Monsterdisappear(string &in asParent, string &in asChild, int alState)
{
FadeEnemyToSmoke("Brute", true);
}

He doesnt disappear what can I change?

void Monsterdisappear(string &in asParent, string &in asChild, int alState)
{
SetEntityActive("Brute", false);
}

Try this