Script help

[Rakez68]

It still doesn't work. the script now is:
void OnStart()
{
SetLocalVarInt("Var1", 0);
for(int i=1;i<=4;i++) AddUseItemCallback("Chem"+i, "GetAcidComplete", "UsedChemsOnPot", true, 0);
}
void UsedChemsOnPot(string &in asItem, string &in asEntity)
{
if("asParent" == "Chem1" && GetLocalVarInt("Var1") == 1)
{
AddLocalVarInt("Var1", 1);
}
else if("asParent" == "Chem2" && GetLocalVarInt("Var1") == 1)
{
AddLocalVarInt("Var1", 1);
}
else if("asParent" == "Chem3" && GetLocalVarInt("Var1") == 1)
{
AddLocalVarInt("Var1", 1);
}
else if("asParent" == "Chem4" && GetLocalVarInt("Var1") == 1)
{
AddLocalVarInt("Var1", 1);
}

if(GetLocalVarInt("Var1") == 4)
{
GiveSanityBoostSmall();
SetEntityActive("GetAcidComplete", false);
PlayMusic("26_event_agrippa_head.ogg", false, 0.7, 0.1, 10, false);
}
}

FATAL ERROR: Could not load script file 'custom_stories/His dearest friend/Maps/WineCellar.hps'!
main (16, 24) : ERR : No matching signatures to 'AddUseItemCallback(string@&, string@&, string@&, const bool, const uint)'