Unreal Engine Issues and Bug Tracker (UE-90550)

Description

The heightmap and weightmaps were created using Terresculptor, and exported in the correct format. If you import everything except the layermaps, the landscape is generated and the layers can be painted on. But if you select the layer maps and then import the engine crashes.

Attached is a project with this setup as well as the needed files.

This was reported and tested in 4.24.3 (CL-11590370). This was reproduced in 4.23.1 (CL-9631420), 4.25 Preview 2 (CL-12055273), and Main 4.26 (CL-12063615)

Steps to Reproduce

Open the UE4 Editor and create a Blank project with Starter Content
Create a Material based off the screenshot provided
Open the Landscape tool and select "Import from File"
For the Heightmap select the Map.png file
Add the Material you made to the Landscape and add Weighted-blend layers for Grass, Dirt, and Stone
Add the respective layer map for Grass, Dirt, and Stone
Click Import

Results: The Editor crashes

Expected: The landscape is generated

Callstack

[2020.03.12-13.14.21:814][ 42]LogWindows: Error: === Critical error: ===
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: 
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\Build\++UE4\Sync\Engine\Source\Runtime\Core\Public\Containers/Array.h] [Line: 614] 
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: Array index out of bounds: 1049488 from an array of size 1048576
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: 
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: 
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff9d81c9159 KERNELBASE.dll!UnknownFunction []
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff95d62a7b6 UE4Editor-Core.dll!ReportAssert() [d:\build\++ue4\sync\engine\source\runtime\core\private\windows\windowsplatformcrashcontext.cpp:1341]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff95d62dc58 UE4Editor-Core.dll!FWindowsErrorOutputDevice::Serialize() [d:\build\++ue4\sync\engine\source\runtime\core\private\windows\windowserroroutputdevice.cpp:79]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff95d3e2c7d UE4Editor-Core.dll!FOutputDevice::LogfImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\outputdevice.cpp:71]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff95d36fd43 UE4Editor-Core.dll!AssertFailedImplV() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:105]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff95d3720c0 UE4Editor-Core.dll!FDebug::CheckVerifyFailedImpl() [d:\build\++ue4\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:455]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff96562b088 UE4Editor-Landscape.dll!DispatchCheckVerify<void,<lambda_7af30e359a65048da2472ae75f5f5fa4> >() [d:\build\++ue4\sync\engine\source\runtime\core\public\misc\assertionmacros.h:168]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff96545f6ec UE4Editor-Landscape.dll!ALandscapeProxy::Import() [d:\build\++ue4\sync\engine\source\runtime\landscape\private\landscapeedit.cpp:2378]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff9441cdff5 UE4Editor-LandscapeEditor.dll!FLandscapeEditorDetailCustomization_NewLandscape::OnCreateButtonClicked() [d:\build\++ue4\sync\engine\source\editor\landscapeeditor\private\landscapeeditordetailcustomization_newlandscape.cpp:843]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff944189bd4 UE4Editor-LandscapeEditor.dll!TBaseSPMethodDelegateInstance<0,FLandscapeEditorDetailCustomization_NewLandscape,0,FReply __cdecl(void)>::Execute() [d:\build\++ue4\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:293]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff96b841498 UE4Editor-Slate.dll!SButton::ExecuteOnClick() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:385]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff96b859281 UE4Editor-Slate.dll!SButton::OnMouseButtonUp() [d:\build\++ue4\sync\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:304]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff96b6b323f UE4Editor-Slate.dll!FEventRouter::Route<FReply,FEventRouter::FToLeafmostPolicy,FPointerEvent,<lambda_6c1f6b862bcfb82ea6dcab28fbcc9463> >() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:372]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff96b739175 UE4Editor-Slate.dll!FSlateApplication::RoutePointerUpEvent() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:4617]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff96b72413e UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonUpEvent() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5140]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff96b718f67 UE4Editor-Slate.dll!FSlateApplication::OnMouseUp() [d:\build\++ue4\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5108]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff9b00b4ca1 UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1958]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff9b00a242f UE4Editor-ApplicationCore.dll!FWindowsApplication::DeferMessage() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:2410]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff9b00b7195 UE4Editor-ApplicationCore.dll!FWindowsApplication::ProcessMessage() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:1638]
[2020.03.12-13.14.21:814][ 42]LogWindows: Error: [Callstack] 0x00007ff9b009ec40 UE4Editor-ApplicationCore.dll!FWindowsApplication::AppWndProc() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsapplication.cpp:789]
[2020.03.12-13.14.21:815][ 42]LogWindows: Error: [Callstack] 0x00007ff9da377446 USER32.dll!UnknownFunction []
[2020.03.12-13.14.21:815][ 42]LogWindows: Error: [Callstack] 0x00007ff9da376f62 USER32.dll!UnknownFunction []
[2020.03.12-13.14.21:815][ 42]LogWindows: Error: [Callstack] 0x00007ff9b00b8699 UE4Editor-ApplicationCore.dll!FWindowsPlatformApplicationMisc::PumpMessages() [d:\build\++ue4\sync\engine\source\runtime\applicationcore\private\windows\windowsplatformapplicationmisc.cpp:130]
[2020.03.12-13.14.21:815][ 42]LogWindows: Error: [Callstack] 0x00007ff7e2a36db0 UE4Editor.exe!FEngineLoop::Tick() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launchengineloop.cpp:4397]
[2020.03.12-13.14.21:815][ 42]LogWindows: Error: [Callstack] 0x00007ff7e2a4c3ec UE4Editor.exe!GuardedMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\launch.cpp:173]
[2020.03.12-13.14.21:815][ 42]LogWindows: Error: [Callstack] 0x00007ff7e2a4c4ca UE4Editor.exe!GuardedMainWrapper() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
[2020.03.12-13.14.21:815][ 42]LogWindows: Error: [Callstack] 0x00007ff7e2a5ceae UE4Editor.exe!WinMain() [d:\build\++ue4\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:263]
[2020.03.12-13.14.21:815][ 42]LogWindows: Error: [Callstack] 0x00007ff7e2a5fcbe UE4Editor.exe!__scrt_common_main_seh() [d:\agent\_work\2\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288]
[2020.03.12-13.14.21:815][ 42]LogWindows: Error: [Callstack] 0x00007ff9dbae7974 KERNEL32.DLL!UnknownFunction []
[2020.03.12-13.14.21:815][ 42]LogWindows: Error: [Callstack] 0x00007ff9dbd5a261 ntdll.dll!UnknownFunction []

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Fixed

Component	UE - LD & Modeling - Terrain - Landscape
Affects Versions	4.23.1, 4.24.3, 4.25, 4.26
Target Fix	4.25

Fix Commit	12149012
Main Commit	12149023
Release Commit	12149012

Created	Mar 12, 2020
Resolved	Mar 12, 2020
Updated	Jul 30, 2020

UE-90550

Landscape Tool crashes on Layer Import

Landscape Tool crashes on Layer Import

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