Unreal 5.4 problem with a packaged game! Server spawns the character and client disconnecting with ‘Failed to load package’ error.

Development Programming & Scripting Blueprint
, , ,
1

Everything worked fine in 5.3 but in 5.4 I stuck with this problem.
I connect to the server and everything is ok but when it spawns a player character the client got immediately disconnected with the “Error ‘Failed to load package ‘’’. Exiting.”

So… here is the logs

[2024.05.24-15.46.31:617][820]LogNetPackageMap: Warning: GetObjectFromNetGUID: Network checksum mismatch. FullNetGUIDPath: [35]/Game/TopDown/Blueprints/BP_ThirdPersonCharacter.[33]Default__BP_ThirdPersonCharacter_C, 124483537, 159126252
[2024.05.24-15.46.31:617][820]LogNetPackageMap: Warning: InternalLoadObject: Unable to resolve object from path. Path: Default__BP_ThirdPersonCharacter_C, Outer: /Game/TopDown/Blueprints/BP_ThirdPersonCharacter, NetGUID: 33
[2024.05.24-15.46.31:617][820]LogNetPackageMap: Warning: InternalLoadObject: Unable to resolve object. FullNetGUIDPath: [35]/Game/TopDown/Blueprints/BP_ThirdPersonCharacter.[33]Default__BP_ThirdPersonCharacter_C
[2024.05.24-15.46.31:617][820]LogNetPackageMap: Error: UPackageMapClient::SerializeNewActor. Unresolved Archetype GUID. Path: Default__BP_ThirdPersonCharacter_C, NetGUID: 33.
[2024.05.24-15.46.31:617][820]LogNetPackageMap: Error: UPackageMapClient::SerializeNewActor Unable to read Archetype for NetGUID 8 / 33
[2024.05.24-15.46.31:617][820]LogNet: Warning: UActorChannel::ProcessBunch: SerializeNewActor failed to find/spawn actor. Actor: None, Channel: 5
[2024.05.24-15.46.31:618][820]LogOnlineSession: OSS: Player 00000000000000000000000000000000|000211df1c33482c96f594f4258b004b already registered in session GameSession
[2024.05.24-15.46.31:618][820]LogOnlineSession: OSS: Player 00000000000000000000000000000000|0002bb8317574b4aa4ad969d7a844c10 already registered in session GameSession
[2024.05.24-15.46.31:619][820]LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = NetChecksumMismatch, ErrorString = GetObjectFromNetGUID: Network checksum mismatch. FullNetGUIDPath: [35]/Game/TopDown/Blueprints/BP_ThirdPersonCharacter.[33]Default__BP_ThirdPersonCharacter_C, 124483537, 159126252, Driver = Name:GameNetDriver Def:GameNetDriver NetDriverEOSCore_1
[2024.05.24-15.46.31:619][820]LogNet: Warning: Network Failure: GameNetDriver[NetChecksumMismatch]: GetObjectFromNetGUID: Network checksum mismatch. FullNetGUIDPath: [35]/Game/TopDown/Blueprints/BP_ThirdPersonCharacter.[33]Default__BP_ThirdPersonCharacter_C, 124483537, 159126252
[2024.05.24-15.46.31:620][820]LogNet: NetworkFailure: NetChecksumMismatch, Error: ‘GetObjectFromNetGUID: Network checksum mismatch. FullNetGUIDPath: [35]/Game/TopDown/Blueprints/BP_ThirdPersonCharacter.[33]Default__BP_ThirdPersonCharacter_C, 124483537, 159126252’

2

Same here.
It can run in Editor but packed exe is NetChecksumMismatch

Somebody help !

3

There is a temporary solution, until Epic Games fixes it in the next update

by updating DefaultEngine.ini with

[ConsoleVariables]
net.IgnoreNetworkChecksumMismatch=1

Thanks to fysez for sharing the solution

Edit: Also if you are working on other platforms like Android, you need to copy the DefaultEngine configuration file and put it to the path Config\Android\AndroidEngine.ini

4

Thank you Very much. Works for me!

5

You need to fix engine codes:

  • In Character.h, FRepRootMotionMontage struct.
  • In GameplayAbilityRepAnimMontage.h, FGameplayAbilityRepAnimMontage struct.

Try to mark NotReplicated on UPROPERTY or delete variable AnimMontage_DEPRECATED

In Character.h

#if WITH_EDITORONLY_DATA
    /** AnimMontage providing Root Motion */
    UPROPERTY(NotReplicated, meta = (DeprecatedProperty, DeprecationMessage = "Use the GetAnimMontage function instead"))
    TObjectPtr<UAnimMontage> AnimMontage_DEPRECATED = nullptr;
#endif

In GameplayAbilityRepAnimMontage.h,

#if WITH_EDITORONLY_DATA
	/** AnimMontage ref */
	UPROPERTY(NotReplicated, meta = (DeprecatedProperty, DeprecationMessage = "Use the GetAnimMontage function instead"))
	TObjectPtr<UAnimMontage> AnimMontage_DEPRECATED;
#endif
1 Like
6

LogNetPackageMap: Warning: GetObjectFromNetGUID: Network checksum mismatch. FullNetGUIDPath: [33]/Game/VGame/Character/BP_MainPawn.[31]Default__BP_MainPawn_C, 1670283495, 1022904269
LogNetPackageMap: Warning: InternalLoadObject: Unable to resolve object from path. Path: Default__BP_MainPawn_C, Outer: /Game/VGame/Character/BP_MainPawn, NetGUID: 31
LogNetPackageMap: Warning: InternalLoadObject: Unable to resolve object. FullNetGUIDPath: [33]/Game/VGame/Character/BP_MainPawn.[31]Default__BP_MainPawn_C
LogNetPackageMap: Error: UPackageMapClient::SerializeNewActor. Unresolved Archetype GUID. Path: Default__BP_MainPawn_C, NetGUID: 31.
LogNetPackageMap: Error: UPackageMapClient::SerializeNewActor Unable to read Archetype for NetGUID 10 / 31
LogNet: Warning: UActorChannel::ProcessBunch: SerializeNewActor failed to find/spawn actor. Actor: None, Channel: 6
LogNet: Error: UEngine::BroadcastNetworkFailure: FailureType = NetChecksumMismatch, ErrorString = GetObjectFromNetGUID: Network checksum mismatch. FullNetGUIDPath: [33]/Game/VGame/Character/BP_MainPawn.[31]Default__BP_MainPawn_C, 1670283495, 1022904269, Driver = Name:GameNetDriver Def:GameNetDriver IpNetDriver_0
LogNet: Warning: Network Failure: GameNetDriver[NetChecksumMismatch]: GetObjectFromNetGUID: Network checksum mismatch. FullNetGUIDPath: [33]/Game/VGame/Character/BP_MainPawn.[31]Default__BP_MainPawn_C, 1670283495, 1022904269
LogNet: NetworkFailure: NetChecksumMismatch, Error: ‘GetObjectFromNetGUID: Network checksum mismatch. FullNetGUIDPath: [33]/Game/VGame/Character/BP_MainPawn.[31]Default__BP_MainPawn_C, 1670283495, 1022904269’

I comment that code ,but not work for me. Sad …

7

I can confirm this issue, and still not fixed in ue5-main. I probably going to open a bug report for issue tracker.

8

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.