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Not Reproducible

Votes

15

Found in

2017.4.0f1

Issue ID

1025171

Regression

No

[UWP] Compile .Net Native for HoloLens causes (SpatialCoordinateSystem)Marshal.GetObjectForIUnknown exception

XR SDK

-

Steps to reproduce:
1. Download attached project.
2. Build UWP project for HoloLens/D3D. Make sure .Net compile type is used.
3. Open the resulting solution in Visual Studio.
4. Build a x86-Master and deploy to HoloLens.

Expected results: Project runs on HoloLens

Actual results: Exception thrown at NativeSpatialCoordinateSystemPtrTest.cs line 35
Exception thrown: 'System.InvalidCastException' in Assembly-CSharp.dll
An exception of type 'System.InvalidCastException' occurred in Assembly-CSharp.dll but was not handled in user code
Arg_InvalidCastException

Note: works with Debug and Release configuration

Reproduced with: 2018.2.0b1, 2018.1.0f1, 2017.4.1f1, 2017.2.2p3

  1. Resolution Note (2018.4.12f1):

    Looks to be resolved in 2018.4.

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Comments (2)

  1. ibrahimpenekli

    Feb 14, 2019 22:58

    This bug took my hours to resolve it :(

  2. newske

    Oct 09, 2018 00:45

    For anyone stumbling across this issue, a workaround while this is awaiting an official fix:

    On scene load (use the scene load event not Awake()), create a SpatialStationaryFrameOfReference and get the coordinate system. Rather than using the pointer, use the SpatialCoordinateSystem directly. If you're using HoloLensCameraStream this is supported in this fork: https://github.com/camnewnham/HoloLensCameraStream

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