Unreal Engine Issues and Bug Tracker (UE-40244)

Developer Notes

This issue has been closed as 'Won't Fix' due to an extended period of time without updates. If this issue is important to you please let us know by posting on the AnswerHub or UDN, and Epic will re-open the ticket for further review.

Questions & Answers

Description

An ensure is being triggered when you set simulate physics on a child actor on the server and then force net update.

Found in 4.14.2 CL# 3241561. Reproduced in 4.16 Main CL#3247538

Steps to Reproduce

Open the attached project
PIE
Wait ~10-15 seconds
Check the output log

Result: Ensure occurs

LogOutputDevice:Error: Ensure condition failed: !bRegistered || GetAttachParent()->GetAttachChildren().Contains(this) [Link Removed] [Line: 1954]
LogOutputDevice:Error: Attempt to detach SceneComponent 'Cube' owned by 'ChildActor_GEN_VARIABLE_AttachChild_C_CAT_32' from AttachParent 'DefaultSceneRoot' while not attached.

Callstack

LogOutputDevice:Error: === Handled ensure: ===
LogOutputDevice:Error: Ensure condition failed: !bRegistered || GetAttachParent()->GetAttachChildren().Contains(this) [File:D:\Sean.Flint_Z5610_StreamMain\Engine\Source\Runtime\Engine\Private\Components\SceneComponent.cpp] [Line: 1954]
LogOutputDevice:Error: Attempt to detach SceneComponent 'Cube' owned by 'ChildActor_GEN_VARIABLE_AttachChild_C_CAT_32' from AttachParent 'DefaultSceneRoot' while not attached.
LogOutputDevice:Error: Stack: 
LogOutputDevice:Error: UE4Editor-Core.dll!FWindowsPlatformStackWalk::StackWalkAndDump() [d:\sean.flint_z5610_streammain\engine\source\runtime\core\private\windows\windowsplatformstackwalk.cpp:200]
LogOutputDevice:Error: UE4Editor-Core.dll!FDebug::EnsureFailed() [d:\sean.flint_z5610_streammain\engine\source\runtime\core\private\misc\assertionmacros.cpp:233]
LogOutputDevice:Error: UE4Editor-Core.dll!FDebug::OptionallyLogFormattedEnsureMessageReturningFalse() [d:\sean.flint_z5610_streammain\engine\source\runtime\core\private\misc\assertionmacros.cpp:360]
LogOutputDevice:Error: UE4Editor-Engine.dll!USceneComponent::DetachFromComponent() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\components\scenecomponent.cpp:1954]
LogOutputDevice:Error: UE4Editor-Engine.dll!USceneComponent::AttachToComponent() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\components\scenecomponent.cpp:1726]
LogOutputDevice:Error: UE4Editor-Engine.dll!USceneComponent::PostRepNotifies() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\components\scenecomponent.cpp:2990]
LogOutputDevice:Error: UE4Editor-Engine.dll!FObjectReplicator::PostReceivedBunch() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\datareplication.cpp:965]
LogOutputDevice:Error: UE4Editor-Engine.dll!UActorChannel::ProcessBunch() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\datachannel.cpp:2198]
LogOutputDevice:Error: UE4Editor-Engine.dll!UActorChannel::ReceivedBunch() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\datachannel.cpp:2046]
LogOutputDevice:Error: UE4Editor-Engine.dll!UChannel::ReceivedSequencedBunch() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\datachannel.cpp:277]
LogOutputDevice:Error: UE4Editor-Engine.dll!UChannel::ReceivedNextBunch() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\datachannel.cpp:631]
LogOutputDevice:Error: UE4Editor-Engine.dll!UChannel::ReceivedRawBunch() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\datachannel.cpp:361]
LogOutputDevice:Error: UE4Editor-Engine.dll!UNetConnection::ReceivedPacket() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\netconnection.cpp:1195]
LogOutputDevice:Error: UE4Editor-Engine.dll!UNetConnection::ReceivedRawPacket() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\netconnection.cpp:626]
LogOutputDevice:Error: UE4Editor-OnlineSubsystemUtils.dll!UIpNetDriver::TickDispatch() [d:\sean.flint_z5610_streammain\engine\plugins\online\onlinesubsystemutils\source\onlinesubsystemutils\private\ipnetdriver.cpp:227]
LogOutputDevice:Error: UE4Editor-Engine.dll!TBaseUObjectMethodDelegateInstance<0,UNetDriver,void __cdecl(float)>::ExecuteIfSafe() [d:\sean.flint_z5610_streammain\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:858]
LogOutputDevice:Error: UE4Editor-Engine.dll!TBaseMulticastDelegate<void,float>::Broadcast() [d:\sean.flint_z5610_streammain\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:937]
LogOutputDevice:Error: UE4Editor-Engine.dll!UWorld::Tick() [d:\sean.flint_z5610_streammain\engine\source\runtime\engine\private\leveltick.cpp:1257]
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!UEditorEngine::Tick() [d:\sean.flint_z5610_streammain\engine\source\editor\unrealed\private\editorengine.cpp:1630]
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!UUnrealEdEngine::Tick() [d:\sean.flint_z5610_streammain\engine\source\editor\unrealed\private\unrealedengine.cpp:391]
LogOutputDevice:Error: UE4Editor.exe!FEngineLoop::Tick() [d:\sean.flint_z5610_streammain\engine\source\runtime\launch\private\launchengineloop.cpp:3019]
LogOutputDevice:Error: UE4Editor.exe!GuardedMain() [d:\sean.flint_z5610_streammain\engine\source\runtime\launch\private\launch.cpp:166]
LogOutputDevice:Error: UE4Editor.exe!GuardedMainWrapper() [d:\sean.flint_z5610_streammain\engine\source\runtime\launch\private\windows\launchwindows.cpp:130]
LogOutputDevice:Error: UE4Editor.exe!WinMain() [d:\sean.flint_z5610_streammain\engine\source\runtime\launch\private\windows\launchwindows.cpp:206]
LogOutputDevice:Error: UE4Editor.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:253]
LogOutputDevice:Error: KERNEL32.DLL!0x00000000A3818102
LogOutputDevice:Error: ntdll.dll!0x00000000A609C574

Community References

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Fixed

Component	UE - Networking
Affects Versions	4.13.2, 4.14, 4.15
Target Fix	4.22

Fix Commit	4708102
Main Commit	4804559
Release Commit	4862694

Created	Jan 5, 2017
Resolved	Jan 11, 2019
Updated	Feb 12, 2019

View Jira Issue

UE-40244

Ensure When Setting Simulate Physics of a Child Actor on the Server and Forcing NetUpdate

Ensure When Setting Simulate Physics of a Child Actor on the Server and Forcing NetUpdate

Developer Notes

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