Uncaught exception - Invalid field access : components

[SaltyPotatoes2]

I'm trying to pull a component from an entity, however I'm receiving this error.
Uncaught exception - Invalid field access : components

Iterating over entities in:
@:nodes var nodes:Node;

I'm pulling the component using:
node.entity.components.get(Position).body.x;

Called from ecs/systems/client/TiledEnvironmentSystem.hx line 43
Called from cog/System.hx line 44
Called from cog/Engine.hx line 16
Called from EcsManager.hx line 129
Called from Play.hx line 77
Called from Main.hx line 55
Called from openfl/events/EventDispatcher.hx line 402
Called from a C function
Called from openfl/display/DisplayObject.hx line 1399
Called from openfl/display/Stage.hx line 1159
Invalid field access : components
Called from ? line 1
Called from ApplicationMain.hx line 25
Called from ApplicationMain.hx line 130
Called from lime/app/Application.hx line 150
Called from lime/_internal/backend/native/NativeApplication.hx line 146
Called from a C function
Called from lime/_internal/backend/native/NativeApplication.hx line 370
Called from lime/_internal/macros/EventMacro.hx line 91
Called from openfl/display/Stage.hx line 1950
Called from openfl/display/Stage.hx line 1163
Called from openfl/display/Stage.hx line 1423
Called from openfl/display/Stage.hx line 1159
Called from openfl/display/DisplayObject.hx line 1399
Called from a C function
Called from openfl/events/EventDispatcher.hx line 402
Called from Main.hx line 55
Called from Play.hx line 77
Called from EcsManager.hx line 129
Called from cog/Engine.hx line 16
Called from cog/System.hx line 44
Called from ecs/systems/client/TiledEnvironmentSystem.hx line 43
Uncaught exception - Invalid field access : components

[MSGhero]

You might be going about it wrong? Here's what I use:
@:nodes var nodes:Node<Animation, Flag>;
if (node.animation.index < etc)
node.flag.set(etc)

[AustinEast]

@MSGhero is correct, you need to specify at least 1 component when defining your nodes

So instead of this:
@:nodes var nodes:Node;

You need to do something like this:
@:nodes var nodes:Node<MyComponent>;

*Edit - actually just tested it, and specifying no components (like @:nodes var nodes:Node;) should actually work just fine, so the issue is lying elsewhere..

[AustinEast]

Are you sure your "Entity" class (from node.entity.components.get(Position).body.x;) has it's components field assigned correctly? For example:

class Entity {
    public var components:Components;

    public function new() {
        // Make sure that the `components` field is assigned
        components = new Components();

        components.entity = this;
    }
}

As a side note, all Node instances have a reference to their relevant components object. So you could just do this:

node.components.get(Position).body.x;

instead of:

node.entity.components.get(Position).body.x;