Forum Libraries, Components, and Plugins

Issue with Xamarin iOS/Reactive Extensions with ARM64

Just wondering if anyone has ideas on this issue (See

The problem does not occur on the emulator.

Are the Rx components getting an update?


  • JamesMontemagnoJamesMontemagno USForum Administrator, Xamarin Team, Developer Group Leader Xamurai

    Are you using a Classic or Unified project? It looks like it has already been updated to Unified. I will ask the components team to try to repo.

  • JonathanDickJonathanDick CAXamarin Team, Developer Group Leader Xamurai

    There's a pending update to this component that has Xamarin.iOS 8.6 Unified API Support which will be published at the same time that Xamarin.iOS 8.6 is published to stable.


  • MatthewErbsMatthewErbs AUMember


    Yes it's a Unified project. I will wait for the update and test


  • MatthewErbsMatthewErbs AUMember


    I have updated Xamarin (5.7), Rx (2.2.1) and have XCode (6.1.1).

    I do not believe the problem can be replicated.

    Thanks again.

  • YurySmanYurySman USMember

    Problem still exists (doesn't work provided gist), very critical for my project, could you take a look? In case when project is configured only to compile armv7 binaries, gist works as expected.

    Xamarin Studio
    Version 5.7 (build 661)

    Version: (Enterprise Edition)

  • moljacmoljac HRBeta ✭✭✭
    edited January 2015



    First possible problem: You have Xamarin.iOS 8.4. This might be an issue. (Maybe gist is too old).

    Second problem: Code snippet does not compile on stable channel

    here is my solution + your code snippet + compiler error I get.

    I'll dive in deeper.




  • moljacmoljac HRBeta ✭✭✭

    I'm checking this. Gist compiles. I used fully qualified classname instead of using and extension methods were not found.

    I'm checking this issue in the repo.

    So far I can reproduce it.

  • moljacmoljac HRBeta ✭✭✭

    There is another similar case

    It seems that this might be a bug in Xamarin.iOS related only to ARM64 iOS devices. The Xamarin.iOS team will check this issue too.

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