A_CustomTracer error

[Cacodoomonic]

I'm trying to make a new Revenant attack. I have done this:

 

Actor FDRevenantTracer : RevenantTracer Replaces RevenantTracer
{
	const float TRACEANGLE = 8.4375; 
	const float ZVEL = 0.125;		
	Radius 11
	Height 8
	Speed 5
	FastSpeed 10
	Damage 10
	Projectile 
	+SEEKERMISSILE 
	-RANDOMIZE
	SeeSound "skeleton/attack"
	DeathSound "skeleton/tracex"
	RenderStyle Translucent
	Alpha 1
	
	States
	{
	Spawn:
		FATB AB 2 BRIGHT A_CustomTracer("FDRevenantTracerSmoke", "FDBulletPuff", ZVEL, TRACEANGLE, 0, 0, 4)
		Loop
	Death:
		FBXP A 8 BRIGHT
		FBXP B 6 BRIGHT
		FBXP C 4 BRIGHT
		Stop
	}
}

However when I boot the game, I get the following error message.

Execution could not continue.

Script error, "newdoom.pk3:actors/revenant" line 88:
Invalid parameter 'a_customtracer'

Why is this happening? Can someone advise?

Edited February 6, 2024 by Cacodoomonic

[jaeden]

What is A_CustomTracer? I don't think that function exists in Actor class.