Home Forums Unity SDK Vive Pro Eye : failed to read magic number


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    I’m currently trying to use the HTC Vive Pro Eye in Unity 2020.3.XX LTS. It worked fine one week ago (09/17/2022).

    Now, when I run a Scene with the prefab “TobiiXR Initializer”, Unity either freezes or crashes.

    In the project log I get the following error.

    Cmd: compileSnippet
    insize=16577 file=Assets/DefaultResourcesExtra/Skybox/Procedural pass=<Unnamed Pass> cachingPP=1 ppOnly=0 stripLineD=0 buildPlatform=19 rsLen=0 pKW=UNITY_ENABLE_REFLECTION_BUFFERS UNITY_USE_DITHER_MASK_FOR_ALPHABLENDED_SHADOWS UNITY_PBS_USE_BRDF1 …

    Unhandled exception: Protocol error – failed to read magic number (error -2147483644, transferred 0/4)

    Quitting shader compiler process

    Does anyone have any idea what is the root of the problem?

    Master Hou

    Hi Caterina,

    I’m seeing the same error message, did you manage to find a solution?


    Grant [Tobii]

    Hi, this is a very old version of Unity… can you try on the latest LTS and report back?

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