This Jira was created from CrashReports submitted by the public due to the high number of occurrences. Descriptions from users are provided below.
Error message:
Assertion failed: LandscapeActor.IsNull() || LandscapeActor.Get() == Landscape [Link Removed] [Line: 1855]
Most recent user affected CL: 3106830
Logs:
[Link Removed]
[Link Removed]
Create a streaming level containing a landscape actor
Create another streaming level
In the levels window, select both streaming levels and then choose "merge..." from the "Levels" menu
crash
UE4Editor_Landscape!ULandscapeInfo::UnregisterActor() [landscape.cpp:1856] UE4Editor_Landscape!ALandscapeProxy::UnregisterAllComponents() [landscape.cpp:1033] UE4Editor_Engine!AActor::BeginDestroy() [actor.cpp:475] UE4Editor_CoreUObject!UObject::ConditionalBeginDestroy() [obj.cpp:739] UE4Editor_CoreUObject!CollectGarbageInternal() [garbagecollection.cpp:1281] UE4Editor_CoreUObject!CollectGarbage() [garbagecollection.cpp:1320] UE4Editor_UnrealEd!UEditorEngine::Cleanse() [editorengine.cpp:1948] UE4Editor_UnrealEd!EditorLevelUtils::RemoveLevelFromWorld() [editorlevelutils.cpp:413] UE4Editor_WorldBrowser!FLevelCollectionModel::UnloadLevels() [levelcollectionmodel.cpp:630] UE4Editor_WorldBrowser!FStreamingLevelCollectionModel::UnloadLevels() [streaminglevelcollectionmodel.cpp:142] UE4Editor_WorldBrowser!FStreamingLevelCollectionModel::MergeSelectedLevels_Executed() [streaminglevelcollectionmodel.cpp:586] UE4Editor_WorldBrowser!TBaseSPMethodDelegateInstance<0,FStreamingLevelCollectionModel,0,TTypeWrapper<void> __cdecl() [delegateinstancesimpl.h:317] UE4Editor_WorldBrowser!TBaseSPMethodDelegateInstance<0,FStreamingLevelCollectionModel,0,void __cdecl() [delegateinstancesimpl.h:423] UE4Editor_Slate!FUICommandList::ExecuteAction() [uicommandlist.cpp:92] UE4Editor_Slate!SMenuEntryBlock::OnClicked() [smenuentryblock.cpp:1027] UE4Editor_Slate!SMenuEntryBlock::OnMenuItemButtonClicked() [smenuentryblock.cpp:987] UE4Editor_Slate!TMemberFunctionCaller<SMenuEntryBlock,FReply() [delegateinstanceinterface.h:161] UE4Editor_Slate!TTupleImpl<TIntegerSequence<unsigned int> >::ApplyAfter<TMemberFunctionCaller<SMenuEntryBlock,FReply() [tuple.h:115] UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SMenuEntryBlock,0,FReply __cdecl() [delegateinstancesimpl.h:317] UE4Editor_Slate!TBaseDelegate<FReply>::Execute() [delegatesignatureimpl.inl:521] UE4Editor_Slate!SButton::OnMouseButtonUp() [sbutton.cpp:278] UE4Editor_Slate!SMenuEntryButton::OnMouseButtonUp() [smenuentryblock.cpp:385] UE4Editor_Slate!<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1>::operator() [slateapplication.cpp:4901] UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_8d0e9a1da76abd0a756a3a9d775f5ed1> >() [slateapplication.cpp:215] UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [slateapplication.cpp:4890] UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [slateapplication.cpp:5348] UE4Editor_Slate!FSlateApplication::OnMouseUp() [slateapplication.cpp:5328] UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [windowsapplication.cpp:1584] UE4Editor_Core!FWindowsApplication::DeferMessage() [windowsapplication.cpp:1930] UE4Editor_Core!FWindowsApplication::ProcessMessage() [windowsapplication.cpp:747] UE4Editor_Core!FWindowsApplication::AppWndProc() [windowsapplication.cpp:669] user32!<Unknown> user32!<Unknown> UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [windowsplatformmisc.cpp:905] UE4Editor!FEngineLoop::Tick() [launchengineloop.cpp:2788] UE4Editor!GuardedMain() [launch.cpp:156] UE4Editor!GuardedMainWrapper() [launchwindows.cpp:126] UE4Editor!WinMain() [launchwindows.cpp:202] UE4Editor!__scrt_common_main_seh() [exe_common.inl:264] kernel32!<Unknown> ntdll!<Unknown>
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-36267 in the post.
| 0 |
| Component | UE - LD & Modeling - Terrain - Landscape |
|---|---|
| Affects Versions | 4.13 |
| Target Fix | 4.14 |
| Created | Sep 21, 2016 |
|---|---|
| Resolved | Nov 23, 2016 |
| Updated | Apr 12, 2018 |