UE4 4.22.3 Crash at 95% on startup

Development Platform & Builds
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1

Hi all, tried to open my project today and I keep crashing at 95% with this error:

Assertion failed: LODIndex >= 0 && LODIndex < 8 [File:D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp] [Line: 1331]

0x00007ff8012b9129 KERNELBASE.dll!UnknownFunction []
0x00007fff99ce1f37 UE4Editor-Core.dll!UnknownFunction []
0x00007fff99ce46e7 UE4Editor-Core.dll!UnknownFunction []
0x00007fff99af7d1a UE4Editor-Core.dll!UnknownFunction []
0x00007fff99a7fe33 UE4Editor-Core.dll!UnknownFunction []
0x00007fff99a804d0 UE4Editor-Core.dll!UnknownFunction []
0x00007fff979669c0 UE4Editor-Engine.dll!UnknownFunction []
0x00007fff9794d30b UE4Editor-Engine.dll!UnknownFunction []
0x00007fff9794e3a7 UE4Editor-Engine.dll!UnknownFunction []
0x00007fff9794efa5 UE4Editor-Engine.dll!UnknownFunction []
0x00007fff9797dae2 UE4Editor-Engine.dll!UnknownFunction []
0x00007fff995113cb UE4Editor-CoreUObject.dll!UnknownFunction []
0x00007fff96f8a672 UE4Editor-Engine.dll!UnknownFunction []
0x00007fff995113cb UE4Editor-CoreUObject.dll!UnknownFunction []
0x00007fff99357f5a UE4Editor-CoreUObject.dll!UnknownFunction []
0x00007fff9937edcf UE4Editor-CoreUObject.dll!UnknownFunction []
0x00007fff9935b1ae UE4Editor-CoreUObject.dll!UnknownFunction []
0x00007fff9937f2e6 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00007fff9937e01d UE4Editor-CoreUObject.dll!UnknownFunction []
0x00007fff99341d09 UE4Editor-CoreUObject.dll!UnknownFunction []
0x00007fff9730b726 UE4Editor-Engine.dll!UnknownFunction []
0x00007fff972d3507 UE4Editor-Engine.dll!UnknownFunction []
0x00007fff9731ccca UE4Editor-Engine.dll!UnknownFunction []
0x00007fff97bddbaf UE4Editor-Engine.dll!UnknownFunction []
0x00007fff97bb5369 UE4Editor-Engine.dll!UnknownFunction []
0x00007fff951a168e UE4Editor-UnrealEd.dll!UnknownFunction []
0x00007fff9519317f UE4Editor-UnrealEd.dll!UnknownFunction []
0x00007fff9517c42f UE4Editor-UnrealEd.dll!UnknownFunction []
0x00007fff9590f0aa UE4Editor-UnrealEd.dll!UnknownFunction []
0x00007fff954c4cdb UE4Editor-UnrealEd.dll!UnknownFunction []
0x00007fff954c4abc UE4Editor-UnrealEd.dll!UnknownFunction []
0x00007fff95943b0a UE4Editor-UnrealEd.dll!UnknownFunction []
0x00007fff9590cf24 UE4Editor-UnrealEd.dll!UnknownFunction []
0x00007ff748c75443 UE4Editor.exe!UnknownFunction []
0x00007ff748c755ca UE4Editor.exe!UnknownFunction []
0x00007ff748c8316c UE4Editor.exe!UnknownFunction []
0x00007ff748c85b8e UE4Editor.exe!UnknownFunction []
0x00007ff802327974 KERNEL32.DLL!UnknownFunction []
0x00007ff80515a271 ntdll.dll!UnknownFunction []

If anyone has any idea what could be the issue (my guess is the LODIndex issue shown above) please let me know.
Thank you!

2

Well, I think you are right. The error indicates that a mesh has either no LODs or more than eight. If you are buildingfrom source you can run in debug and drop a breakpoint at the assertion point. If not, look at the log and see what asset the editor was trying to load. You may have a message before the crash with a clue to the offending asset.

If that fails, you may want to identify any recently added static meshes and delete them before launching. Either way, something is wrong with the asset. Good luck.