Fatal Editor Crash only when played in editor

Development Programming & Scripting Blueprint
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1

Game works fine on my home PC but at work I am getting this error on my work PC when I spawn an actor. If I package the game and run it on the work PC it works fine. No idea what’s going on here.

MachineId:B891E18843028ECCA94698AF18A73551
EpicAccountId:1cf590df5bce496b9a9f418ceab3fdad

Unknown exception - code 00000001 (first/second not available)

"Assertion failed: Package->IsFullyLoaded() [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.8\Engine\Source\Runtime\Engine\Private\PackageMapClient.cpp] [Line: 1872]
"

UE4Editor_Core!FDebug::AssertFailed() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\core\private\misc\outputdevice.cpp:355]
UE4Editor_Engine!FNetGUIDCache::GetObjectFromNetGUID() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\engine\private\packagemapclient.cpp:1876]
UE4Editor_Engine!UPackageMapClient::InternalLoadObject() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\engine\private\packagemapclient.cpp:707]
UE4Editor_Engine!UPackageMapClient::InternalLoadObject() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\engine\private\packagemapclient.cpp:604]
UE4Editor_Engine!UPackageMapClient::ReceiveNetGUIDBunch() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\engine\private\packagemapclient.cpp:896]
UE4Editor_Engine!UChannel::ReceivedRawBunch() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\engine\private\datachannel.cpp:297]
UE4Editor_Engine!UNetConnection::ReceivedPacket() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\engine\private\netconnection.cpp:1002]
UE4Editor_Engine!UNetConnection::ReceivedRawPacket() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\engine\private\netconnection.cpp:460]
UE4Editor_OnlineSubsystemUtils!UIpNetDriver::TickDispatch() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\online\onlinesubsystemutils\private\ipnetdriver.cpp:176]
UE4Editor_Engine!TBaseUObjectMethodDelegateInstance<0,UNetDriver,void cdecl(float)>::ExecuteIfSafe() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:772]
UE4Editor_Engine!TBaseMulticastDelegate::Broadcast() [d:\buildfarm\buildmachine++depot+ue4-releases+4.8\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:1031]
UE4Editor_Engine!UWorld::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\engine\private\leveltick.cpp:1094]
UE4Editor_UnrealEd!UEditorEngine::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\unrealed\private\editorengine.cpp:1339]
UE4Editor_UnrealEd!UUnrealEdEngine::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\editor\unrealed\private\unrealedengine.cpp:366]
UE4Editor!FEngineLoop::Tick() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\launch\private\launchengineloop.cpp:2359]
UE4Editor!GuardedMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor!GuardedMainWrapper() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\buildfarm\buildmachine_++depot+ue4-releases+4.8\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]

2

Hey Zeetu,

Thank you so much for providing as much information that you did. In order to better assist you, could you please provide me exact reproduction steps to cause this to happen. Also, could you possibly inform me of the hardware differences between your home and work PC? Did you obtain UE4 from the Epic Games Launcher or through GitHub?

With that being said, I did go ahead and enter a for this specific issue since a crash was involved, it can be referenced as UE-18727.

Looking forward to hearing back from you, thanks!

3

,

I figured it out. I created a variable in a class that inherited from another class. (using blueprints). I then deleted that variable and created it with the same name in the top level class. This gave me an import error when I opened the editor and caused the crash. Once I renamed the variable it worked fine.

4

I’m glad that you were able to resolve this issue. If you notice that you have any other trouble with the editor crashing, please let us know and we’ll assist you further.

Have a great weekend!