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Fixed in 2018.3



Found in


Issue ID




[WSA] XMLSerializerException thrown when running the IL2CPP build

Steps to reproduce:
1. Open the attached project (
2. Open the Assets/Game.unity scene
3. Switch platform to Windows Store
4. Build for WSA Universal 10 SDK (IL2CPP backend), Build type - XAML
5. Open Visual Studio solution
6. Deploy on local machine (Debug or Release)
7. Observe the errors in the Output console

Expected result: Errors should not appear in the Output console
Actual result: Errors appear in the Output console

Not reproducible with Master mode

Reproduced with: 5.6.0b10, 5.6.0b11, 2017.1.0a2
Not reproduced with: 5.4.5f1, 5.5.2p2

Fixed in: 2018.3.0a11 (on .NET Standard 2.0 Api Compatibility Level)

Comments (15)

  1. 8b1a42e8bcbf816696f60a10cfa3b940?d=mm


    Jun 06, 2018 11:56

    The problem here is managed code in System.Xml.dll that does not place nicely with an AOT compiler (like IL2CPP).

    We've corrected this issue in 2018.1 and 2018.2. In those versions of Unity, you will need to use the .Net Standard 2.0 Api Compatibility Level to get the AOT-friendly version of System.Xml.dll. In Unity 2018.3 we will also have an AOT-friendly version of System.Xml.dll for the .NET 4.x Api Compatibility Level.

    I'm not sure why I marked this as Won't Fix - that was an error. Sorry!

  2. 8e139f8256eddbc34469cbe7a4db28d6?d=mm


    Jan 24, 2018 10:31

    this bug is still there in 2017.3.0f3

  3. 1dbfe4bb49644f119dbc71b33aee2c03?d=mm


    Oct 30, 2017 15:58

    Six months later still not fixed. 2017.2. We cannot update any of our games for Windows. The alternative .NET build has other issues. Shall we give up using Unity?

  4. B3baa89d22c968bba147e5bf7bed5e10?d=mm


    Apr 25, 2017 07:07

    Unfortunately for me, this bug is also reproducible in Master mode.

  5. 028b7ebb9463459544b3d8440ef92025?d=mm


    Apr 25, 2017 06:50

    Also reproduced in master mode.
    This withhold us from publishing because of other bugs in 5.5.2, so please, could this get a higher prio?

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