Unreal Engine 5.1.1 The project crash at the start.

[Iv_so (Ivan Sorce)]

After i updated the project to 5.1.1 i keep getting this problem and i can’t open the project anymore

[lucoiso]

Can you upload the generated logs? (PROJECT_DIR/Saved/Logs)

[lucoiso]

These steps seem to have fixed at least one of the issues:

Unreal Engine 5.1.1 update Crash

There are a lot of errors and warnings like Attempted to access index 0 from array ‘…’ of length 0 TConvex ‘…’ has no Geometry Failed to compile Material Instance with Base ‘…’ for platform PCD3D_SM5, Default Material will be used in game. Failed to load ‘…’: Can’t find file. Failed to load package for import object ‘Package …’ Exporting geometry with too many verticies (1960200). This might cause performance and memory issues. Simplify collision or change GeometryExportVertexCountWarningThres…

Unreal Engine 5.1.1 update Crash

Yep, add this line to Config/DefaultEngine.ini and try opening the project again to check if will continue crashing r.AntiAliasingMethod=3

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Related to: 5.1.1 + TSR = crash

[Lord_Pol]

@Unreal Engine 5.1.1 update Crash

r.AntiAliasingMethod=3

Halo. I just switch to TAA in project settings. We can continue working at least. Thanx for your help!

[Frakatchoo]

Same issue for me, TSR crash my project, others antialiasing methods works.
Waiting for a solution to bring the TSR back.

[Iv_so (Ivan Sorce)]

sorry for the Delay.
I found in the Log that the problem was the Nvidia Dlss

[2023.02.11-18.41.12:394][ 0]LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000b0fc25b6174
[2023.02.11-18.41.12:394][ 0]LogWindows: Error:
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc93d71713 UnrealEditor-RenderCore.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc5e4955dc UnrealEditor-NISShaders.dll!AddSharpenOrUpscalePass() [C:\BuildAgent\work\206b5a556ada38bf_Stage\Plugin\NIS\HostProject\Plugins\NIS\Source\NISShaders\Private\NISShaders.cpp:632]
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc40452f73 UnrealEditor-NISCore.dll!FNVImageUpscaler::AddPasses() [C:\BuildAgent\work\206b5a556ada38bf_Stage\Plugin\NIS\HostProject\Plugins\NIS\Source\NISCore\Private\NISUpscaler.cpp:204]
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc6649e15f UnrealEditor-Renderer.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc65cd6655 UnrealEditor-Renderer.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc66812d04 UnrealEditor-Renderer.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc667df967 UnrealEditor-Renderer.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc667f7ff1 UnrealEditor-Renderer.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc667ffe18 UnrealEditor-Renderer.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc79542fdd UnrealEditor-Core.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc7954352e UnrealEditor-Core.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc93e4f804 UnrealEditor-RenderCore.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc93e53b54 UnrealEditor-RenderCore.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc79c65342 UnrealEditor-Core.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffc79c5d230 UnrealEditor-Core.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffd0ca655a0 KERNEL32.DLL!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error: [Callstack] 0x00007ffd0d0a485b ntdll.dll!UnknownFunction []
[2023.02.11-18.41.12:394][ 0]LogWindows: Error:

I fixed the problem by deleting the old DLSS plugin folder and reinstalled.

[Lance_Mungia]

I tried deleting the Nvidia DLSS folder and the project loaded right up as usual. Thanks so much for posting this fix. I’m on a super tight deadline and this problem would have wrecked it. Whew!

[Lance_Mungia]

I am having this exact same problem as well. Updated to 5.1.1 last night, and this morning my project will not open, crashing immediately. I will try to delete the Engine DLSS folder and see if that does the trick and let you know. Thanks.

[Get_DOVAH_it]

Greetings @Iv_so !

Just so you’re aware, this topic has been moved from the International forum category to the Development - Platform & Builds forum category.

Remember, when posting, please review the categories to ensure your topic is posted in the most relevant space.

Wishing you the best of luck in your project endeavors,

Your Friendly Neighborhood Moderator

[Eekee1]

where is the Engine DLSS folder

[R.Alipta]

I am also facing the same issue. I am using a MSI laptop with RTX2060 card.

[Iv_so (Ivan Sorce)]

To fix this problem replace the DLSS folder inside the plugin folder, it’s located inside your project folder

’
Here is the official page from NVIDIA to download the latest plugin.
https://developer.nvidia.com/downloads/20230209-dlss-sr-plugin-ue-511-zip

I hope this will help!

[Iv_so (Ivan Sorce)]

Update the latest driver and all the plugin you have installed.
This will probably fix your problem