Flamethrower Errors

[BoingBoing]

I'm using a flamethrower base for my other swep.

Everything works fine currently except for an error that doesn't seem to affect anything but it's annoying as heck.

attempt to call a nil value

If I remove this code in my Swep lua it goes away:
[lua]
local trace = self.Owner:GetEyeTrace()
local flamefx = EffectData()
flamefx:SetOrigin(trace.HitPos)
flamefx:SetStart(self.Owner:GetShootPos())
flamefx:SetAttachment(1)
flamefx:SetEntity(self.Weapon)
util.Effect("swep_flamethrower_flame",flamefx,true,true)[/lua]

So it probably has something to do with the particles.

Here's the flamethrower particle script:
[lua]function EFFECT:Init( data )
local HitPos = data:GetOrigin()
local Weapon = data:GetEntity()
local Attachment = data:GetAttachment()
local StartPos = self:GetTracerShootPos( self.Position, Weapon, Attachment )

if Weapon:IsValid() then

local emitter = ParticleEmitter(StartPos)

for i=0, 8 do

local particle = emitter:Add( "effects/muzzleflash" .. math.random(2,3) .. "", StartPos )

if (particle) then

particle:SetVelocity( ((HitPos - StartPos):GetNormal() * math.random(1720,1820)) + (VectorRand() * math.random(142,172)) )

particle:SetLifeTime( 0 )
particle:SetDieTime( 0.52 )

particle:SetStartAlpha( math.random(82,112) )
particle:SetEndAlpha( 0 )

particle:SetStartSize( math.random(4,6) )
particle:SetEndSize( math.random(32,52) )

particle:SetRoll( math.Rand(-360, 360) )
particle:SetRollDelta( math.Rand(-7.2, 7.2) )

particle:SetAirResistance( math.random(128, 256) )

particle:SetCollide( true )

particle:SetGravity( Vector( 0, 0, 64 ) )

end
end

emitter:Finish()

end
end[/lua]

Anyone has any idea what's wrong?

[BoingBoing]

Still waiting.

[StylixX]

[lua]local StartPos = self:GetTracerShootPos( self.Position, Weapon, Attachment ) [/lua]
Is self.Position valid? Shouldn't you use data:GetStart()?