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Crash when creat landscape

hello guys i start to make a game with some friends but when i try to creat a landscape ue4 crash and i got this message,
and when ue4 dont crash i can’t creat my landscape i dont know if i do something wrong but i dont find solution on google
i dont know what to do any suggestions, ideas, are welcome

Thank you

LoginId:8f014d20425de9b8120e5aaa8e55ee6c
EpicAccountId:d2920d99f9d3446e9bec1d14fcd34881

Assertion failed: NewTab.IsValid() [File d:/Build/++UE4+Licensee/Sync/Engine/Source/Runtime/Slate/Private/Framework/Docking/TabManager.cpp] [Line: 1163]

UE4Editor_Core!AssertFailedImplV() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:100]
UE4Editor_Core!FDebug::CheckVerifyFailedImpl() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Core\Private\Misc\AssertionMacros.cpp:450]
UE4Editor_Slate!FTabManager::InvokeTab() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Docking\TabManager.cpp:1163]
UE4Editor_LevelEditor!SLevelEditor::OnEditorModeIdChanged() [D:\Build++UE4+Licensee\Sync\Engine\Source\Editor\LevelEditor\Private\SLevelEditor.cpp:1486]
UE4Editor_LevelEditor!TBaseSPMethodDelegateInstance<0,SLevelEditor,0,void __cdecl(FName const &,bool)>::ExecuteIfSafe() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:374]
UE4Editor_UnrealEd!FEditorModeTools::BroadcastEditorModeIDChanged() [D:\Build++UE4+Licensee\Sync\Engine\Source\Editor\UnrealEd\Public\EditorModeManager.h:457]
UE4Editor_UnrealEd!FEditorModeTools::ActivateMode() [D:\Build++UE4+Licensee\Sync\Engine\Source\Editor\UnrealEd\Private\EditorModeManager.cpp:1087]
UE4Editor_LevelEditor!SLevelEditor::ToggleEditorMode() [D:\Build++UE4+Licensee\Sync\Engine\Source\Editor\LevelEditor\Private\SLevelEditor.cpp:1443]
UE4Editor_LevelEditor!TBaseStaticDelegateInstance<void __cdecl(void),FName>::ExecuteIfSafe() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:859]
UE4Editor_Slate!FUICommandList::ExecuteAction() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Commands\UICommandList.cpp:102]
UE4Editor_Slate!SMenuEntryBlock::OnClicked() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\MultiBox\SMenuEntryBlock.cpp:1059]
UE4Editor_Slate!SMenuEntryBlock::OnMenuItemButtonClicked() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\MultiBox\SMenuEntryBlock.cpp:1019]
UE4Editor_Slate!TBaseSPMethodDelegateInstance<0,SMenuEntryBlock,0,FReply __cdecl(void)>::Execute() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Core\Public\Delegates\DelegateInstancesImpl.h:298]
UE4Editor_Slate!SButton::ExecuteOnClick() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SButton.cpp:385]
UE4Editor_Slate!SButton::OnMouseButtonUp() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Widgets\Input\SButton.cpp:304]
UE4Editor_Slate!SMenuEntryButton::OnMouseButtonUp() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\MultiBox\SMenuEntryBlock.cpp:386]
UE4Editor_Slate!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_cc5aea9e7377b04ce85c30c65ec3889b> >() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:372]
UE4Editor_Slate!FSlateApplication::RoutePointerUpEvent() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:4675]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonUpEvent() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5198]
UE4Editor_Slate!FSlateApplication::OnMouseUp() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Slate\Private\Framework\Application\SlateApplication.cpp:5166]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessDeferredMessage() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2133]
UE4Editor_ApplicationCore!FWindowsApplication::DeferMessage() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:2585]
UE4Editor_ApplicationCore!FWindowsApplication::ProcessMessage() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:1809]
UE4Editor_ApplicationCore!FWindowsApplication::AppWndProc() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsApplication.cpp:852]
user32
user32
UE4Editor_ApplicationCore!FWindowsPlatformApplicationMisc::PumpMessages() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\ApplicationCore\Private\Windows\WindowsPlatformApplicationMisc.cpp:130]
UE4Editor!FEngineLoop::Tick() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Launch\Private\LaunchEngineLoop.cpp:4762]
UE4Editor!GuardedMain() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Launch\Private\Launch.cpp:169]
UE4Editor!GuardedMainWrapper() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:137]
UE4Editor!WinMain() [D:\Build++UE4+Licensee\Sync\Engine\Source\Runtime\Launch\Private\Windows\LaunchWindows.cpp:268]
UE4Editor!__scrt_common_main_seh() [d:\agent_work\5\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
kernel32
ntdll

What are your PC specs?

What are the following values used for creation?

  • Scale?
  • Section Size?
  • Sections per Component?
  • Number of Components?
  • Overall Resolution?

thanks for your answer but i can’t set this value i just can’t press thx button New+

pc spec :

I7 4790
H97 gaming 3
12GB ram 1600mhz
gtx 970 evga
SSD1 : samsung 500gb (system)
SSD2 : Kingstone 240gb (UE4)
HHD1 : WD 1TB 7200

i just find a the solution, landscape creaton window was hide in a corner of my screen.