The crash occurs when FWorldPartitionHLODUtilities::BuildHLOD attempts to build an approximated mesh that has all of its contents culled during generation, this can happen when an approximated mesh is configured with the "EGroundPlanePolicy::FixedZHeightGroundPlane" GroundPlanePolicy, and all of the static meshes for this specific WP HLOD actor are below the GroundZPlaneHeight.
See UDN for more details.
see issue case information
[2023.04.26-17.05.48:061][ 0]LogWindows: Error: === Critical error: === [2023.04.26-17.05.48:062][ 0]LogWindows: Error: [2023.04.26-17.05.48:062][ 0]LogWindows: Error: Assertion failed: Owner->IsMeshDescriptionValid(0) [File:C:\Build\UE5-Main\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp] [Line: 3071] [2023.04.26-17.05.48:063][ 0]LogWindows: Error: Bad MeshDescription on /Game/__ExternalActors__/Level/E/WR/Z2TA70682ZP7545VJHTVBA.StaticMesh_HLODLayer_Merged_0 [2023.04.26-17.05.48:064][ 0]LogWindows: Error: [2023.04.26-17.05.48:064][ 0]LogWindows: Error: [2023.04.26-17.05.48:064][ 0]LogWindows: Error: [Callstack] 0x00007ffdc060a899 UnrealEditor-Engine.dll!UStaticMesh::CacheDerivedData() [C:\Build\UE5-Main\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:5419] [2023.04.26-17.05.48:065][ 0]LogWindows: Error: [Callstack] 0x00007ffdc061eaec UnrealEditor-Engine.dll!UStaticMesh::ExecutePostLoadInternal() [C:\Build\UE5-Main\Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:6130] [2023.04.26-17.05.48:066][ 0]LogWindows: Error: [Callstack] 0x00007ffdc061b4cc UnrealEditor-Engine.dll!FAsyncTask<FStaticMeshAsyncBuildWorker>::DoTaskWork() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Public\Async\AsyncWork.h:626] [2023.04.26-17.05.48:068][ 0]LogWindows: Error: [Callstack] 0x00007ffdbeb6d3f3 UnrealEditor-Engine.dll!FAsyncTaskBase::DoWork() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Public\Async\AsyncWork.h:289] [2023.04.26-17.05.48:069][ 0]LogWindows: Error: [Callstack] 0x00007ffdbeb6cf4e UnrealEditor-Engine.dll!FAsyncTaskBase::DoThreadedWork() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Public\Async\AsyncWork.h:313] [2023.04.26-17.05.48:070][ 0]LogWindows: Error: [Callstack] 0x00007ffdd3225ac3 UnrealEditor-Core.dll!FQueuedThreadPoolWrapper::FScheduledWork::DoThreadedWork() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Public\Misc\QueuedThreadPoolWrapper.h:141] [2023.04.26-17.05.48:071][ 0]LogWindows: Error: [Callstack] 0x00007ffdd3225ac3 UnrealEditor-Core.dll!FQueuedThreadPoolWrapper::FScheduledWork::DoThreadedWork() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Public\Misc\QueuedThreadPoolWrapper.h:141] [2023.04.26-17.05.48:072][ 0]LogWindows: Error: [Callstack] 0x00007ffdd320dac7 UnrealEditor-Core.dll!`LowLevelTasks::FTask::Init<`FQueuedLowLevelThreadPool::AddQueuedWork'::`2'::<lambda_1> >'::`11'::<lambda_1>::operator()() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Public\Async\Fundamental\Task.h:499] [2023.04.26-17.05.48:074][ 0]LogWindows: Error: [Callstack] 0x00007ffdd321d0f3 UnrealEditor-Core.dll!LowLevelTasks::TTaskDelegate<LowLevelTasks::FTask * __cdecl(bool),48>::TTaskDelegateImpl<`LowLevelTasks::FTask::Init<`FQueuedLowLevelThreadPool::AddQueuedWork'::`2'::<lambda_1> >'::`11'::<lambda_1>,0>::CallAndMove() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Public\Async\Fundamental\TaskDelegate.h:171] [2023.04.26-17.05.48:076][ 0]LogWindows: Error: [Callstack] 0x00007ffdd2e38425 UnrealEditor-Core.dll!LowLevelTasks::FTask::ExecuteTask() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Public\Async\Fundamental\Task.h:627] [2023.04.26-17.05.48:077][ 0]LogWindows: Error: [Callstack] 0x00007ffdd2e3830c UnrealEditor-Core.dll!LowLevelTasks::FScheduler::ExecuteTask() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:172] [2023.04.26-17.05.48:078][ 0]LogWindows: Error: [Callstack] 0x00007ffdd2e18f1c UnrealEditor-Core.dll!LowLevelTasks::FScheduler::TryExecuteTaskFrom<LowLevelTasks::TLocalQueueRegistry<1024>::TLocalQueue,&LowLevelTasks::TLocalQueueRegistry<1024>::TLocalQueue::DequeueGlobal,0>() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:350] [2023.04.26-17.05.48:080][ 0]LogWindows: Error: [Callstack] 0x00007ffdd2e5ede2 UnrealEditor-Core.dll!LowLevelTasks::FScheduler::WorkerMain() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:378] [2023.04.26-17.05.48:081][ 0]LogWindows: Error: [Callstack] 0x00007ffdd2e27900 UnrealEditor-Core.dll!UE::Core::Private::Function::TFunctionRefCaller<`LowLevelTasks::FScheduler::CreateWorker'::`2'::<lambda_1>,void __cdecl(void)>::Call() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Public\Templates\Function.h:479] [2023.04.26-17.05.48:152][ 0]LogWindows: Error: [Callstack] 0x00007ffdd30050e1 UnrealEditor-Core.dll!FThreadImpl::Run() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Private\HAL\Thread.cpp:67] [2023.04.26-17.05.48:153][ 0]LogWindows: Error: [Callstack] 0x00007ffdd34e9bb2 UnrealEditor-Core.dll!FRunnableThreadWin::Run() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:149] [2023.04.26-17.05.48:154][ 0]LogWindows: Error: [Callstack] 0x00007ffdd34e0577 UnrealEditor-Core.dll!FRunnableThreadWin::GuardedRun() [C:\Build\UE5-Main\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:79] [2023.04.26-17.05.48:155][ 0]LogWindows: Error: [Callstack] 0x00007ffe9bf57604 KERNEL32.DLL!UnknownFunction []
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-184375 in the post.
| 0 |
| Component | UE - World Creation - Worldbuilding Tools - HLOD |
|---|---|
| Target Fix | 5.3 |
| Fix Commit | 25215145 |
|---|---|
| Main Commit | 25219751 |
| Created | Apr 26, 2023 |
|---|---|
| Resolved | Apr 27, 2023 |
| Updated | May 29, 2023 |