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By Design
Votes
0
Found in [Package]
2.0.0
Issue ID
MTTB-1619
Regression
Yes
[Multiplayer Play Mode] Re-enabling the Hierarchy panel using the Layout button duplicates the Virtual Player window and throws errors
Steps to reproduce:
- Open the attached project
- Open the TestScene
- In the Multiplayer Play Mode window, start a Virtual Player
- Enter Play Mode
- In the Virtual Player window, press the Layout button
- Enable Hierarchy
- Disable Hierarchy
- Re-enable Hierarchy (Hierarchy window does not open and throws warnings related to another case)
- Try disabling Game and Console panels
Actual results: The Virtual Player window is duplicated. One copy displays the Hierarchy panel, and the other displays the Game and Console panels. "An editor should only have 0 or 1 TopView." Warnings and Errors are also thrown
Expected results: Re-enabling the Hierarchy panel does not cause any warnings or errors
Reproducible with versions: 2.0.0-pre.1 (6000.3.0b4, 6000.4.0a1)
Not reproducible with versions: 1.6.1 (6000.0.59f1, 6000.2.5f1)
Tested on (OS): macOS 26.0
Notes:
- Only reproducible with Hierarchy V2. It can be enabled via Preferences -> General -> Use new Hierarchy Window
Full Error message:
- An editor should only have 0 or 1 TopView. [2]
UnityEngine.Debug:Assert (bool,string)
Unity.Multiplayer.PlayMode.Editor.TopView/<>c__DisplayClass3_0:<CreateGUI>b__5 () (at /Users/bokken/build/output/unity/unity/Modules/MultiplayerEditor/Managed/MultiplayerPlayMode/Workflow/UI/TopView.cs:121)
UnityEditor.EditorApplication:Internal_CallUpdateFunctions () (at /Users/bokken/build/output/unity/unity/Editor/Mono/EditorApplication.cs:392)
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Resolution Note:
This is working as expected and is not a regression - MPPM Virtual Editors supports Hierarchy, but not V2 Hierarchy out of the box.
The Bisection has flagged this commit "RAT-2385 Backport Hierarchy Editor module from U7 to U6" - that backported the new V2 Hierarchy feature to U6.
Having said that, this is a new feature that we'll work on to support.
As such, closing as expected / as designed.