Error Zero Divisor

[Opticalsnare 12]

Can't get my script to work, worked in A2 doesn't work in A3

_projectile = _this select 6;

_tracer = "#particlesource" createVehicle getPos (_this select 6);
_tracer setParticleCircle [0, [0, 0, 0]];
_tracer setParticleRandom [0, [0, 0, 0], [2.5, 2.5, 2.5], 0, 0, [0, 0, 0, 0], 0, 0, random 360];

_tracer setParticleParams 
[["warfxPE\ParticleEffects\Universal\smoke_02", 1, 0, 1],
"",
"Billboard",
1,
6, 

[0, 0, 0],

[(velocity _tracer select 0) - ((vectordir _projectile) select 0)*50,
(velocity  _tracer select 1) - ((vectordir _projectile) select 1)*50,
(velocity  _tracer select 2) - ((vectordir _projectile) select 2)*50],
0, 10.15, 7.9, 1.5, [2,4], [[1, 1, 1, 0.2],[1, 1, 1, 0]], [1], 0, 0, "", "", _projectile];

_tracer setdropinterval 0.002;

RPT reports

Error in expression <iles\AAmissile.sqf"

_projectile = _this select 6;

_tracer = "#particlesource" c>

Error position: <select 6;

_tracer = "#particlesource" c>

Error Zero divisor

[headswe 17]

Can't get my script to work, worked in A2 doesn't work in A3

_projectile = _this select 6;

_tracer = "#particlesource" createVehicle getPos (_this select 6);
_tracer setParticleCircle [0, [0, 0, 0]];
_tracer setParticleRandom [0, [0, 0, 0], [2.5, 2.5, 2.5], 0, 0, [0, 0, 0, 0], 0, 0, random 360];

_tracer setParticleParams 
[["warfxPE\ParticleEffects\Universal\smoke_02", 1, 0, 1],
"",
"Billboard",
1,
6, 

[0, 0, 0],

[(velocity _tracer select 0) - ((vectordir _projectile) select 0)*50,
(velocity  _tracer select 1) - ((vectordir _projectile) select 1)*50,
(velocity  _tracer select 2) - ((vectordir _projectile) select 2)*50],
0, 10.15, 7.9, 1.5, [2,4], [[1, 1, 1, 0.2],[1, 1, 1, 0]], [1], 0, 0, "", "", _projectile];

_tracer setdropinterval 0.002;

RPT reports

I assume you are using the Fired eventhandler?, standard A3 or CBA?

[Sealife 22]

Looks like you are not picking your projectile up

How are you calling the script ?