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Engine Crash On Launch

Yesterfay everything was working fine, today morning, when I launch the engine it crashes with following log:

Assertion failed: Existing.Linker->ExportMap[Existing.LinkerIndex].Object==this [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectLinker.cpp] [Line: 107]

What is going on?

Product Version: UE 4.22
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asked Jun 03 '19 at 02:19 AM in Bug Reports

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avatar image Jeff A ♦♦ STAFF Jun 03 '19 at 07:27 PM


We've recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.



avatar image villehappo 5 days ago

I've gotten the same issue twice now. I found that there were three UIs which were all causing the issue. Compiling any of them or trying to open a level, which BP was referencing them crashed the engine.

I removed the three UIs and re-made them. The issue went away.

Today I closed my project and tried opening it again, and the same issue appeared. Those UIs were not complex in any way. Background image and a few buttons.

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