Unreal Engine 5.1.1 Fatal Error!.... Anyone can help me pls?

Hey! after I recompile my project in “Visual Studio” I got this error when my project opening… and I can’t fix ;(… Someone know how fix that?

My project crash after this 94% Performing Post-load

Fatal error!

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000000

0x00007ff85263a8a6 UnrealEditor-MovieScene.dll!UnknownFunction []
0x00007ff85268124c UnrealEditor-MovieScene.dll!UnknownFunction []
0x00007ff8526715e5 UnrealEditor-MovieScene.dll!UnknownFunction []
0x00007ff871fb9c5e UnrealEditor-CoreUObject.dll!UnknownFunction []
0x00007ff87213c344 UnrealEditor-CoreUObject.dll!UnknownFunction []
0x00007ff872126512 UnrealEditor-CoreUObject.dll!UnknownFunction []
0x00007ff87214dad8 UnrealEditor-CoreUObject.dll!UnknownFunction []
0x00007ff87214c3c4 UnrealEditor-CoreUObject.dll!UnknownFunction []
0x00007ff87214c930 UnrealEditor-CoreUObject.dll!UnknownFunction []
0x00007ff8578cf025 UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff8578bebef UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff8578b1c65 UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff8582ba912 UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff857c03cdf UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff857c0375f UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff8582eb206 UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff8582b865b UnrealEditor-UnrealEd.dll!UnknownFunction []
0x00007ff72f9c277c UnrealEditor.exe!UnknownFunction []
0x00007ff72f9c296a UnrealEditor.exe!UnknownFunction []
0x00007ff72f9c5680 UnrealEditor.exe!UnknownFunction []
0x00007ff72f9d71b4 UnrealEditor.exe!UnknownFunction []
0x00007ff72f9da516 UnrealEditor.exe!UnknownFunction []
0x00007ff8ce297614 KERNEL32.DLL!UnknownFunction []
0x00007ff8cf4c26f1 ntdll.dll!UnknownFunction []

Hello @Suavaooo ,
I have a few question.

Do you remember how is the first time this crash occur? after you add something or what?

Did it compiled successfully in the VS?
Also if it’s compiled successfully but can’t open it, have you try deleting your Intermediate and Saved folder then Regenerate the project file? (NOTE: Beware of deleting your saved folder, maybe you want to backup your folder first if you want but not optional)

Yeah it compiled successfully in VS… but now I got this error when I try to build in Unreal

UATHelper: Packaging (Windows): LogWindows: Error: begin: stack for UAT
UATHelper: Packaging (Windows): LogWindows: Error: === Critical error: ===
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: Fatal error!
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000000
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffff867a8a6 UnrealEditor-MovieScene.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffff86c124c UnrealEditor-MovieScene.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffff86b15e5 UnrealEditor-MovieScene.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff808d09c5e UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff808e8c344 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff808e76512 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff808e9dad8 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff808e9c3c4 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff808e9c930 UnrealEditor-CoreUObject.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffffe6057d2 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffffe605a02 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffffe60f810 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffffe621870 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffffe6211a5 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffffe37f780 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ffffe3a16a3 UnrealEditor-UnrealEd.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff77377b0ce UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff773772688 UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff77377296a UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff773775680 UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7737871b4 UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff7737896f2 UnrealEditor-Cmd.exe!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff863dd7614 KERNEL32.DLL!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error: [Callstack] 0x00007ff864b826f1 ntdll.dll!UnknownFunction []
UATHelper: Packaging (Windows): LogWindows: Error:
UATHelper: Packaging (Windows): LogWindows: Error: end: stack for UAT
PackagingResults: Error: begin: stack for UAT
PackagingResults: Error: === Critical error: ===
PackagingResults: Error: Fatal error!
PackagingResults: Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000000
PackagingResults: Error: [Callstack] 0x00007ffff867a8a6 UnrealEditor-MovieScene.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffff86c124c UnrealEditor-MovieScene.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffff86b15e5 UnrealEditor-MovieScene.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff808d09c5e UnrealEditor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff808e8c344 UnrealEditor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff808e76512 UnrealEditor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff808e9dad8 UnrealEditor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff808e9c3c4 UnrealEditor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff808e9c930 UnrealEditor-CoreUObject.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffffe6057d2 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffffe605a02 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffffe60f810 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffffe621870 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffffe6211a5 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffffe37f780 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ffffe3a16a3 UnrealEditor-UnrealEd.dll!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff77377b0ce UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff773772688 UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff77377296a UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff773775680 UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff7737871b4 UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff7737896f2 UnrealEditor-Cmd.exe!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff863dd7614 KERNEL32.DLL!UnknownFunction []
PackagingResults: Error: [Callstack] 0x00007ff864b826f1 ntdll.dll!UnknownFunction []
PackagingResults: Error: end: stack for UAT
UATHelper: Packaging (Windows): Took 99,1965459s to run UnrealEditor-Cmd.exe, ExitCode=3
UATHelper: Packaging (Windows): ERROR: Cook failed.
UATHelper: Packaging (Windows): (see C:\Users\Bernardo\AppData\Roaming\Unreal Engine\AutomationTool\Logs\E+UE_5.1\Log.txt for full exception trace)
PackagingResults: Error: Cook failed.
UATHelper: Packaging (Windows): AutomationTool executed for 0h 3m 28s
UATHelper: Packaging (Windows): AutomationTool exiting with ExitCode=25 (Error_UnknownCookFailure)
UATHelper: Packaging (Windows): BUILD FAILED
PackagingResults: Error: Unknown Cook Failure

have you try deleting your Intermediate and Saved folder then Regenerate the VS project file?

Yeah I tried this…

I got a fix for this problem… just make a new thirdperson project and migrate my old project to this new one and make a new c++ and compile again

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