NullReferenceException: Object reference not set to an instance of an object

Unity Engine
1

Hello guys,

I am looking for some help related to this problem: give the following code:

var gg = GameObject.Find("i_SwapCameras");

print(gg ? "Found i_SwtichCameras" : "i_SwitchCma not found");

if(gg) {
    var component = gg.GetComponent("i_SwapCameras");
    print(component ? "Found i_SwapCameras" : "i_SwapCameras  not found");

	gg.GetComponent("i_SwapCameras").switchIso2Perspective();
}
	return;
}

for whatever reason I get a NullReference Exception error at the GetCompoment(“i_SwapCameras”) which is a component of the object named “i_SwapCameras”. The script file is i_SwapCameras.js and it’s attached to the object but … for whatever reason the GetComponent returns an error :((

Any idea why?

Thanks.
GC./

2

Are you sure it’s referring to the component and not the function? What does your print return?

Edit: While I have seen script names being fetched in quotes before ,I personally always use:

var component : i_SwapCameras = gg.GetComponent(i_SwapCameras);

I’m not sure if it matters though.

-Patrick

3

What do your print statements return?

It seems your code will call the switchIsoToPerspective regardless of whether the first getComponent call succeeded or not…

I mean, there’s no return if component is null…

Btw, you don’t have to getComponent twice there… Since you’ve stored it in that component variable, you could just do
component.SwitchIsoToPerspective()

Hope ths helps

Cheers

4

The thing is that

the print returns that it can’t find the object i_SwapCameras, but it is in my hierarchy (see the attachd). I have to say that I named “i_SwapCameras” both to the GameObject and the attached script but I would be rather surprised if that is the problem. :frowning:

Cheers,
GC.

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5

sorry, I CAN find the object i_SwapCameras, but I CAN’T retrieve the attached component i_SwapCameras (which is a js).

6

Actually for whatever reason this codind solved the problem:

function onGUI_SetIsoViewCamera() {
var gg = GameObject.Find("i_SwapCameras");

print(gg ? "Found i_SwtichCameras" : "i_SwitchCma not found");

if(gg) {
    var component = gg.GetComponent("i_SwapCamerasScript");
    print(component ? "Found i_SwapCamerasScript" : "i_SwapCamerasScript not found");

	component.switchIso2Perspective();
}
	return;
}

Thanks everybody for the help!