Need some help with this script

[Roenlond]

Spoiler below!

void OnStart()
{
AddEntityCollideCallback("Player", "AreaActivateGrunt", "Func01", false, 1);
AddEntityCollideCallback("servant_grunt_1", "AreaDisableGrunt", "Func02", false, 1);
SetEntityPlayerInteractCallback("bone_saw_2", "GiveSanityAndAlertGrunt", false);
AddEntityCollideCallback("servant_grunt_2", "AreaDisableSecondGrunt", "DisableSecondGrunt", false, 1);
AddEntityCollideCallback("Player", "AreaDeadManInCloset", "LookAtDeadMan", true, 1);
AddUseItemCallback("", "studykey", "mansion_3", "UnlockStudyHallway", true);
PlayMusic("00_creak.ogg", true, 1.0f, 0, 0, true);
}
void Func01(string &in asParent, string &in asChild, int alState)
{
if (HasItem("lantern_1") == true)
{
SetEntityActive("servant_grunt_1", true);
RemoveEntityCollideCallback("Player", "AreaActivateGrunt");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_1", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_3", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_6", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_7", 4.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_8", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_9", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_10", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_11", 2.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_12", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_13", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_14", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_15", 2.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_16", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_17", 2.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_18", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_20", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_21", 2.0f, "");
}
}

void Func02(string &in asParent, string &in asChild, int alState)
{
SetEntityActive("servant_grunt_1", false);
}

void UnlockStudyHallway(string &in asItem, string &in asEntity)
{
SetSwingDoorLocked("mansion_3", false, true);
PlaySoundAtEntity("", "unlock_door", "mansion_3", 0, false);
RemoveItem("studykey");
}
void GiveSanityAndAlertGrunt(string &in entity)
{
SetPlayerSanity(100);
PlaySoundAtEntity("DanielSanityGain", "ui_sanity_gain", "Player", 0.0f, false);
AddTimer("TimerActivateSecondGrunt", 3.0f, "ActivateSecondGrunt");
}
void ActivateSecondGrunt(string &in asTimer)
{
SetEntityActive("servant_grunt_2", true);
StopSound("DanielSanityGain", 0);
AddEnemyPatrolNode("servant_grunt_2", "PathNodeArea_4", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_2", "PathNodeArea_5", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_2", "PathNodeArea_19", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_2", "PathNodeArea_22", 4.0f, "");
AddEnemyPatrolNode("servant_grunt_2", "PathNodeArea_23", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_2", "PathNodeArea_24", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_2", "PathNodeArea_25", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_2", "PathNodeArea_26", 0.0f, "");
AddEnemyPatrolNode("servant_grunt_2", "PathNodeArea_27", 0.0f, "");
}
void DisableSecondGrunt(string &in asParent, string &in asChild, int alState)
{
SetEntityActive("servant_grunt_2", false);
}
void LookAtDeadMan(string &in asParent, string &in asChild, int alState)
{
if (GetEntityExists("servant_grunt_2") == false)
{
StartPlayerLookAt("corpse_male_1", 0.5f, 0.5f, "");
AddTimer ("TimerStopLookDeadMan", 2.0f, "StopLookDeadMan");
GiveSanityDamage(15, true);
PlayMusic("04_event_stairs", false, 1, 0.25f, 0, false);
AddTimer("reacttocorpse", 0.5f, "TimerPlayerReactToCorpse");
}
}
void TimerPlayerReactToCorpse(string &in asTimer)
{
PlaySoundAtEntity("scarecorpse", "react_breath", "Player", 0.1f, false);
}
void StopLookDeadMan(string &in asTimer)
{
StopPlayerLookAt();
}

I changed the syntax for the bone saw. That should sort that, but I didn't find anything wrong with the LookAtDeadMan. It's probably something to do with the "if (GetEntityExists("servant_grunt_2") == false)". I frankly have no idea why you want to use that, try doing it without that part to check if it works.