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Resolving the "The project is currently open in the Unity Editor. Please close it in the Editor to proceed with this operation." Error

Updated

The "Project Open in Unity Editor" error occurs when a Unity process runs in the background or a UnityLockfile remains in the project folder. To resolve, end all Unity processes via Task Manager or Activity Monitor, delete the UnityLockfile in the Library or Temp folder, relaunch Unity Hub as administrator (Windows), and restart the computer if needed. Contact support with logs if unresolved.

Resolution:

  1. End All Unity Processes:

    • Windows: Open Task Manager (Ctrl+Shift+Esc) and end any tasks named Unity.exe, Unity Hub.exe, or other Unity-related background processes.

    • macOS: Open Activity Monitor and force quit any processes named Unity or Unity Hub.

  2. Delete the Lock File:

    • Navigate to your project folder.

    • Delete the UnityLockfile located inside the Library folder or the Temp folder. This file can remain if the editor previously crashed or closed improperly.

  3. Relaunch with Administrator Permissions (Windows):

    • Right-click the Unity Hub icon and select "Run as administrator."

    • Try opening your project again.

  4. Restart Your Computer:

    • If the steps above do not resolve the issue, a full system restart can clear any lingering processes or memory issues causing the lock.

If these steps do not resolve the issue, please contact support and include your log file for further assistance.

 

 

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