i`m getting empty pointer in move torp, here is what i did, and thanks for all this help
Code:

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function move_torp1
{
	var bullet_speed; // this var will store the speed of the bullet
	var trace_coords;
	my.skill1 = 1;
	my.enable_entity = on;
   my.enable_block = on;
   my.enable_impact = on;
   my.visible = on;
	my.transparent = on;
	my.bright = on;
	my.passable = off;
	my.scale_x = 0.5;//scale it down to have it's size
   my.scale_y = my.scale_x;//same as scale x
   my.scale_z = my.scale_x;//same as scale x
   my.event = remove_torp1; // when it collides with something, its event function (remove_bullets) will run
	vec_set(my.pan, player.pan);
	bullet_speed.x = 40 * time_step; // adjust the speed of the bullet here
	bullet_speed.y = 0; // the bullet doesn't move sideways
	bullet_speed.z = 0; // then don't allow the gravity to have its ways with the bullet
	while (my.skill1);
 // this loop will run for as long as the bullet exists (it isn't "null")
	{
		// move the bullet ignoring the passable entities and store the result in distance_covered
		c_move (my, bullet_speed, nullvector, ignore_passable);
		wait (1);
		ent_remove(me);
	}
}

function remove_torp1() // this function runs when the bullet collides with something
{
my.skill1 = 0; 

}

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