Level open crash

Development Platform & Builds Debugging, Optimization, & Profiling
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1

Hi, I was rendering my environment art scene and suddenly it crash and could not be able to open the level again. Here’s the crash log, please help.

LoginId:f06f32ee4b98198c70463e804f091686
EpicAccountId:e05a79d06fc6496e847b9426b9463707

Assertion failed: Export.ObjectName!=NAME_None || !(Export.ObjectFlags&RF_Public) [File:D:\build++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\LinkerLoad.cpp] [Line: 4779]

UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_CoreUObject
UnrealEditor_ContentBrowserAssetDataSource
UnrealEditor_ContentBrowserAssetDataSource
UnrealEditor_ContentBrowserAssetDataSource
UnrealEditor_ContentBrowserAssetDataSource
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_ContentBrowser
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_Slate
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
UnrealEditor_ApplicationCore
user32
user32
UnrealEditor_ApplicationCore
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll

2

Hello there @Gustfuu!

Checking around the community, this error has popped up from time to time. Assertion failed: Export.ObjectName!=NAME_None aims at UE trying to load an element that is either missing or invalid. Since the problem started with the crash, it could be related to bad/corrupt data resulting from said crash. Let’s take a few steps for resolution:

  • Try to roll back to a previous state before the crash, via loading any auto-saves present in your project folder (usually at /Saved/Backup/). Simply copy the most recent backup to your Content folder, then rename it to your original level name.

  • If this is not possible, then we need to fully clear the project’s cache, via closing UE, then deleting Intermediate, Saved, Binaeries, and DerivedDataCache folders from your main directory. After that, regenerate your project files from VS, and re-open UE, this will fully rebuild your asset data.

  • If the issue still persists, I would suggest opening a different level, then using the content browser to reach the files of your affected level, select everything, right-click > Asset Actions > “Validate Assets”. If any fails are encounreted, then apply “Fix Up Redirectors”.