Creating instance for non-existing object: <somenumber> | What Did I Do Wrong? - game-maker

Question

Every time I run my little game, it throws me the following, fatal, error:
ERROR in
action number 2
of Trigger Event:
for object obj_y:
Creating instance for non-existing object: 100012
I have no idea what's causing it. The only time I use obj_y, is in one file. When I comment that part out, it still keeps nagging it's non-existing.
My code:
var randomxnumber;
var randomynumber;
var randomarraynumber;
var array;
var snelheid;
snelheid = 3.5;
array[0] = obj_a;
array[1] = obj_b;
array[2] = obj_c;
array[3] = obj_d;
array[4] = obj_e;
array[5] = obj_f;
array[6] = obj_g;
array[7] = obj_h;
array[8] = obj_i;
array[9] = obj_j;
array[10] = obj_k;
array[11] = obj_l;
array[12] = obj_m;
array[13] = obj_n;
array[14] = obj_o;
array[15] = obj_p;
array[16] = obj_q;
array[17] = obj_r;
array[18] = obj_s;
array[19] = obj_t;
array[20] = obj_u;
array[21] = obj_v;
array[22] = obj_w;
array[23] = obj_x;
array[24] = obj_y;
array[25] = obj_z;
randomxnumber = random_range(0, 50);
randomynumber = random_range(-10, -50);
for (int = 0; int < 20; int += 1){
if(randomxnumber >= window_get_width()){
randomxnumber -= 100;
} else {
randomxnumber += 50;
}
randomynumber -= 50;
array[int] = instance_create(randomxnumber, randomynumber, array[random_range(0, 26)]);
with(array[int]){
vspeed = snelheid;
}
}
My obj_y object:
Quick note, I'm on GameMaker 8.1 Standard. I'm I being stupid and just missing something?

Answer 1

It's very strange code, I don't understand what you trying to do.
Although there are two errors.
array[random_range(0, 26)]
should be
array[irandom_range(0, 25)
GM rounds array's index, so if value is more than 25 (25.1, etc) you will have out of array bounds.
Second.
array[int] = instance_create(...)
There instance's id will be stored into array. Not object's id. But instance_create requires object index. You can get object's index using object_index variable:
array[int] = instance_create(randomxnumber, randomynumber, array[irandom_range(0, 25)].object_index);