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Fixed in Unity 2018.3



Found in


Issue ID




Prefab instance management script loses references to the main objects in the scene after building and saving the project

Scene Management



Priority: 7Not yet prioritized for a release


Severity: 3Secondary functionality broken

How to reproduce:
1. Open the user-submitted project ("")
2. In the Project Window's Development" folder open the "Scene" scene
3. Build the Project
4. Go to File -> Save Project

Expected result: The project is saved without any issues
Actual result: The references to the window objects are lost and the console throws the "MissingMethodException: UnityEngine.Object UnityEditor.PrefabUtility.GetCorrespondingObjectFromSource(UnityEngine.Object)" error

Reproduced in: 2019.2.0a6, 2019.1.0b4, 2018.3.7f1, 2018.3.0b6
Couldn't test with: 2017.4.20f1 (Project throws dozens of errors, possibly due to incompatible plugins)

Comments (6)

  1. Cf7f8a0b60950afd0c7810133aeb4ff2?d=mm


    Mar 08, 2019 21:31

    The second bug related to this one is fixed in 2018.3.8.

  2. Cf7f8a0b60950afd0c7810133aeb4ff2?d=mm


    Mar 05, 2019 18:29

    Still broken on 2018.3.7

  3. 0796dee7dcb195afd81d4f632d8cccad?d=mm


    Mar 05, 2019 09:08

    In what 2018.3 version is this fixed? It still happens with the newest 2018.3.7f1 version just released.

  4. F296fabbd32e5ecb5b24b4fc661540df?d=mm


    Feb 19, 2019 20:04

    Should be higher priority.

  5. Cf7f8a0b60950afd0c7810133aeb4ff2?d=mm


    Feb 16, 2019 00:24

  6. Cf7f8a0b60950afd0c7810133aeb4ff2?d=mm


    Feb 15, 2019 21:54

    It looks like this is fixed in 2018.3.6 but actually it's not. I'll send a new bug report.

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