Summary
I got this error when adding a Quixel grass-mesh to my project via Quixel bridge:
Ensure condition failed: InLevel->GetWorld()->GetSubsystem()->IsLevelPartition() [File:D:\build++UE5\Sync\Engine\Source\Runtime\Foliage\Private\InstancedFoliage.cpp] [Line: 2957]
Stack:
0x00007ff843cded76 UnrealEditor-Foliage.dll!UnknownFunction
0x00007fffe87d9e02 UnrealEditor-MegascansPlugin.dll!AssetUtils::AddFoliageTypesToLevel() [D:\build++UE5\Sync\LocalBuilds\Bridge\2025.0.1\HostProject\Plugins\Bridge\Source\MegascansPlugin\Private\Utilities\MiscUtils.cpp:257]
0x00007fffe87ee9f3 UnrealEditor-MegascansPlugin.dll!AssetUtils::ManageImportSettings() [D:\build++UE5\Sync\LocalBuilds\Bridge\2025.0.1\HostProject\Plugins\Bridge\Source\MegascansPlugin\Private\Utilities\MiscUtils.cpp:273]
0x00007fffe87edb73 UnrealEditor-MegascansPlugin.dll!FImportUAssetNormal::ImportAsset() [D:\build++UE5\Sync\LocalBuilds\Bridge\2025.0.1\HostProject\Plugins\Bridge\Source\MegascansPlugin\Private\AssetImporters\UAssetNormalImport.cpp:88]
0x00007fffe87e177b UnrealEditor-MegascansPlugin.dll!FAssetsImportController::DataReceived() [D:\build++UE5\Sync\LocalBuilds\Bridge\2025.0.1\HostProject\Plugins\Bridge\Source\MegascansPlugin\Private\AssetsImportController.cpp:64]
0x00007fffe87f4c26 UnrealEditor-MegascansPlugin.dll!FDeferredPackageImporter::Tick() [D:\build++UE5\Sync\LocalBuilds\Bridge\2025.0.1\HostProject\Plugins\Bridge\Source\MegascansPlugin\Private\TCPServer.cpp:37]
0x00007fffdadf293b UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007fffdf2b0165 UnrealEditor-Engine.dll!UnknownFunction
0x00007fffdb3bbeea UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007fffdbf26c36 UnrealEditor-UnrealEd.dll!UnknownFunction
0x00007ff711102779 UnrealEditor.exe!UnknownFunction
0x00007ff7110ec4ac UnrealEditor.exe!UnknownFunction
0x00007ff7110ec5ba UnrealEditor.exe!UnknownFunction
0x00007ff7110f1256 UnrealEditor.exe!UnknownFunction
0x00007ff711105c74 UnrealEditor.exe!UnknownFunction
0x00007ff71110902a UnrealEditor.exe!UnknownFunction
0x00007ff8e098ccb7 KERNEL32.DLL!UnknownFunction
0x00007ff8e22ead6c ntdll.dll!UnknownFunction
What Type of Bug are you experiencing?
Editor
Steps to Reproduce
Create a landscape using Mesh Terrain in UE 5.8.1.
Import grass foliage from the Lawn collection in Quixel bridge.
Expected Result
Not throwing any errors.
Observed Result
See summary
Affects Versions
5.8
Platform(s)
Windows