Unreal Engine Issues and Bug Tracker (UE-43197)

Description

When "Use Single Process" and "Use Less CPU when in Background" are checked off, running a dedicated server in PIE will cause an ensure on exit

Regression:
Yes - Behavior does not occur in binary 4.14.3 (CL3249277)

Steps to Reproduce

Open UE4 Editor
Open Editor Preferences
Navigate to General->Miscellaneous->Performance
Uncheck "Use Less CPU when in Background"
Navigate to Level Editor->Play
Make the following changes
- Set Number of Players to 2
- Uncheck "Use Single Process"
- Set Editor Multiplayer Mode to "Play As Client"
PIE
After both clients load, navigate back to the editor window
Press Escape or use Stop button to end PIE

Result:
Ensure shown in callstack field is triggered on exit

Expected:
PIE exits smoothly without ensure

Callstack

LogOutputDevice:Error: === Handled ensure: ===
LogOutputDevice:Error: Ensure condition failed: NewObject->IsA(this->GeneratedClass) [File:D:\Workspaces\DWilson_Main\Engine\Source\Runtime\Engine\Private\Blueprint.cpp] [Line: 832]
LogOutputDevice:Error: Type mismatch: Expected ThirdPersonExampleMap_C, Found ThirdPersonExampleMap_C
LogOutputDevice:Error: Stack: 
LogOutputDevice:Error: UE4Editor-Core.dll!FWindowsPlatformStackWalk::StackWalkAndDump() [d:\workspaces\dwilson_main\engine\source\runtime\core\private\windows\windowsplatformstackwalk.cpp:200]
LogOutputDevice:Error: UE4Editor-Core.dll!FDebug::EnsureFailed() [d:\workspaces\dwilson_main\engine\source\runtime\core\private\misc\assertionmacros.cpp:233]
LogOutputDevice:Error: UE4Editor-Core.dll!FDebug::OptionallyLogFormattedEnsureMessageReturningFalse() [d:\workspaces\dwilson_main\engine\source\runtime\core\private\misc\assertionmacros.cpp:360]
LogOutputDevice:Error: UE4Editor-Engine.dll!UBlueprint::SetObjectBeingDebugged() [d:\workspaces\dwilson_main\engine\source\runtime\engine\private\blueprint.cpp:828]
LogOutputDevice:Error: UE4Editor-Engine.dll!UWorld::TransferBlueprintDebugReferences() [d:\workspaces\dwilson_main\engine\source\runtime\engine\private\world.cpp:1842]
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!UEditorEngine::TeardownPlaySession() [d:\workspaces\dwilson_main\engine\source\editor\unrealed\private\playlevel.cpp:732]
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!UEditorEngine::EndPlayMap() [d:\workspaces\dwilson_main\engine\source\editor\unrealed\private\playlevel.cpp:318]
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!UEditorEngine::Tick() [d:\workspaces\dwilson_main\engine\source\editor\unrealed\private\editorengine.cpp:1884]
LogOutputDevice:Error: UE4Editor-UnrealEd.dll!UUnrealEdEngine::Tick() [d:\workspaces\dwilson_main\engine\source\editor\unrealed\private\unrealedengine.cpp:391]
LogOutputDevice:Error: UE4Editor.exe!FEngineLoop::Tick() [d:\workspaces\dwilson_main\engine\source\runtime\launch\private\launchengineloop.cpp:3079]
LogOutputDevice:Error: UE4Editor.exe!GuardedMain() [d:\workspaces\dwilson_main\engine\source\runtime\launch\private\launch.cpp:166]
LogOutputDevice:Error: UE4Editor.exe!GuardedMainWrapper() [d:\workspaces\dwilson_main\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
LogOutputDevice:Error: UE4Editor.exe!WinMain() [d:\workspaces\dwilson_main\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
LogOutputDevice:Error: UE4Editor.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
LogOutputDevice:Error: kernel32.dll!0x0000000076DE59CD
LogOutputDevice:Error: ntdll.dll!0x000000007701A561

Community References

[Bug] Editor freeze when testing dedicated server (4.15)

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Cannot Reproduce

Component	UE - Networking
Affects Versions	4.15.1, 4.16
Target Fix	4.19

Fix Commit	3726561
Main Commit	3802705

Created	Mar 22, 2017
Resolved	Oct 30, 2017
Updated	Dec 20, 2017

UE-43197

Ensure triggered when exiting PIE with dedicated server options

Ensure triggered when exiting PIE with dedicated server options

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