Aws-sdk-net: iOS: NullReferenceException: A null value was found where an object instance was required.

[WebVRRollerCoaster]

I'm getting the following exception over and over on iOS using the Unity SDK (using AWS Lambda, AWS S3, AWS Cognito):

NullReferenceException: A null value was found where an object instance was required.
at Amazon.Runtime.Internal.UnityMainThreadDispatcher.ProcessRequests () [0x00000] in :0
at Amazon.Runtime.Internal.UnityMainThreadDispatcher.Update () [0x00000] in :0
at System.IEquatable1[T].Equals (.T other) [0x00000] in <filename unknown>:0 at System.IEquatable1[T].Equals (.T other) [0x00000] in :0
at System.IEquatable1[T].Equals (.T other) [0x00000] in <filename unknown>:0 System.IEquatable1:Equals(T)
System.IEquatable1:Equals(T) System.IEquatable1:Equals(T)

(Filename: currently not available on il2cpp Line: -1)

This is not happening in the Editor. Am I missing something here? Please let me know what would be causing this and how I could debug it, thank you.

[WebVRRollerCoaster]

Any ideas?

[karthiksaligrama]

Can you give me some information as to version of sdk , version of unity and also can you enable logs and tell me what's the response you are getting?

[WebVRRollerCoaster]

@karthiksaligrama
The SDK is 3.1.89 and Unity is 5.3.4, what logs would you like to see?
I think the issue is my Assets\Plugins\iOS folder does not have anything AWS related in it - does your Assets\Plugins\iOS folder have any iOS related scripts in it?

[SoylentGraham]

Same issue. Unity 5.3.6f1. Not sure of AWS .net version (there seem to be a lot of builds scattered about, and I can't see any version numbers bundled in the assets)
Editor in OSX runs, ios (ipad air2) prints above

This is just having a game object with this inside it (not using any other functions or objects)
void Start () { AwsPrefab.Attach (this.gameObject); }

Edit: assemblies say; [assembly: AssemblyVersion ("3.1.0.0")] and AssemblyFileVersion ("3.1.10.0")]

[WebVRRollerCoaster]

@karthiksaligrama Can you please advise what version this is not an issue in? It is important I get this working, can you please advise?

@SoylentGraham It is good to hear I am not the only one experiencing this issue. Thank you so much for providing additional details, have you been able to fix it?

[SoylentGraham]

Not yet, but I may have to dive into it soon, as I have another problem with this SDK/my S3 setup, but the current code doesn't expose the data I need

Note, I don't get this issue on OSX (in editor, or a build, which responds to my commands, listing objects etc)

[WebVRRollerCoaster]

Any update on this?

[Ethan-VisualVocal]

@dfiverr @SoylentGraham I just ran into this today -- it's a code stripping issue. You need to configure a link.xml file to preserve the AWS code you reference (directly or indirectly) and add that file to your Unity project.

Instructions/example found at the bottom of here: https://github.com/aws/aws-sdk-net/blob/master/Unity.README.md

More info on about code stripping and where to place link.xml here:
https://docs.unity3d.com/Manual/iphone-playerSizeOptimization.html

NOTE: if you're running Unity 5.4, UnityWebRequest is no longer in the Experimental namespace, just UnityEngine.Networking.UnityWebRequest, et al.

[WebVRRollerCoaster]

Thank you so much @Ethan-VisualVocal !
Where can I find the link.xml file?

[Ethan-VisualVocal]

@dfiverr you make it... read the docs i linked.

[WebVRRollerCoaster]

@Ethan-VisualVocal Thank you, it works now :D !