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UE4 4.12.4 crashes on Dedicated Server Mode

Hey,

like the topic says the ue4 engine suddenly starts to crash every time I want to test the game in dedicated server mode. This already happened to me a few days ago - I fixed it with a full build of the game - Now it's happening again and I cant fix it :(

Error log of the Engine:

Assertion failed: Property->PropertyFlags & CPF_Net [File:D:\Build++UE4+Release-4.12+Compile\Sync\Engine\Source\Runtime\Engine\Private\RepLayout.cpp] [Line: 2666]

UE4Editor_Core!FDebug::AssertFailed() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:440] UE4Editor_Engine!FRepLayout::InitFromObjectClass() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\replayout.cpp:2668] UE4Editor_Engine!UNetDriver::GetObjectClassRepLayout() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\networkdriver.cpp:3314] UE4Editor_Engine!UNetDriver::FindOrCreateRepChangedPropertyTracker() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\networkdriver.cpp:3298] UE4Editor_Engine!AActor::CallPreReplication() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\actor.cpp:907] UE4Editor_Engine!UNetDriver::ServerReplicateActors_BuildConsiderList() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\networkdriver.cpp:2444] UE4Editor_Engine!UNetDriver::ServerReplicateActors() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\networkdriver.cpp:2923] UE4Editor_Engine!UNetDriver::TickFlush() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\networkdriver.cpp:294] UE4Editor_Engine!TBaseUObjectMethodDelegateInstance<0,UNetDriver,void __cdecl(float)>::ExecuteIfSafe() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:852] UE4Editor_Engine!TBaseMulticastDelegate::Broadcast() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:921] UE4Editor_Engine!UWorld::Tick() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\engine\private\leveltick.cpp:1327] UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\build++ue4+release-4.12+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:1349] UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\build++ue4+release-4.12+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:368] UE4Editor!FEngineLoop::Tick() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2775] UE4Editor!GuardedMain() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\launch\private\launch.cpp:148] UE4Editor!GuardedMainWrapper() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126] UE4Editor!WinMain() [d:\build++ue4+release-4.12+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:200] UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264] kernel32 ntdll

Product Version: UE 4.12
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asked Jun 30 '16 at 08:40 PM in Using UE4

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KAISERslin
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avatar image CriErr Jul 27 '16 at 07:53 AM
avatar image Jake1337 Aug 02 '16 at 09:45 PM

Got similar crashes here with same stack, only for me it happens when I run a multiplayer listen server and client(s) in editor.

This has started happening a while ago but has come to the point where it is near impossible to debug a multiplayer game. Have recently upgraded to 4.12 and problem persists.. If more info is needed please specify what will be useful

avatar image me4dinosaur Aug 08 '16 at 02:42 AM

4.12.5 still having this issue with several projects. Any input from the devs?

avatar image CriErr Aug 08 '16 at 04:55 AM

Did you manage to find clear repro?

avatar image me4dinosaur Aug 08 '16 at 07:37 AM

No not yet. It's also quite inconsistent. I get it sometimes, sometimes I don't.

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3 answers: sort voted first

Bump - Problem is still there :/

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answered Jul 01 '16 at 06:18 PM

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KAISERslin
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I deleted a map out of my content folder and it's fixed. Is it possible that an unused map canmake those errors?

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answered Jul 01 '16 at 06:25 PM

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KAISERslin
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Now after a few days again - UE4 is crashing on In-Editor starts until I delete ALL maps. I downgraded my project to 4.11 again - But I really want to know the problem here?

So - BUMP

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answered Jul 07 '16 at 08:38 AM

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KAISERslin
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