FStaticMeshRenderData::Cache has the assertion:
checkf(Owner->IsMeshDescriptionValid(0), TEXT("Bad MeshDescription on %s"), *GetPathNameSafe(Owner));
This assertion can be triggered by data errors on assets. Sometimes licensees cook their entire depot with -cookall, and cook invalid assets that trigger this error. They can workaround the issue by deleting the assets, but this takes time and it would be better if the cooker gave an error but did not crash on the bad assets.
Callstack from Release-5.2.
Error: === Critical error: === Error: Error: Assertion failed: Owner->IsMeshDescriptionValid(0) [File:Engine\Source\Runtime\Engine\Private\StaticMesh.cpp] [Line: 3048] Error: Bad MeshDescription on <PackageName> Error: Error: Error: FStaticMeshRenderData::Cache() [Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:3048] Error: UStaticMesh::CacheDerivedData() [Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:5349] Error: UStaticMesh::ExecutePostLoadInternal() [Engine\Source\Runtime\Engine\Private\StaticMesh.cpp:6048] Error: FAsyncTask<FStaticMeshAsyncBuildWorker>::DoTaskWork() [Engine\Source\Runtime\Core\Public\Async\AsyncWork.h:617] Error: FAsyncTaskBase::DoWork() [Engine\Source\Runtime\Core\Public\Async\AsyncWork.h:285] Error: FAsyncTaskBase::DoThreadedWork() [Engine\Source\Runtime\Core\Public\Async\AsyncWork.h:309] Error: FQueuedThreadPoolWrapper::FScheduledWork::DoThreadedWork() [Engine\Source\Runtime\Core\Public\Misc\QueuedThreadPoolWrapper.h:128] Error: FQueuedThreadPoolWrapper::FScheduledWork::DoThreadedWork() [Engine\Source\Runtime\Core\Public\Misc\QueuedThreadPoolWrapper.h:128] Error: `LowLevelTasks::FTask::Init<...>'::`11'::<lambda_2>::operator()() [Engine\Source\Runtime\Core\Public\Async\Fundamental\Task.h:499] Error: LowLevelTasks::TTaskDelegate<...>::TTaskDelegateImpl<...>::CallAndMove() [Engine\Source\Runtime\Core\Public\Async\Fundamental\TaskDelegate.h:171] Error: LowLevelTasks::FTask::ExecuteTask() [Engine\Source\Runtime\Core\Public\Async\Fundamental\Task.h:627] Error: LowLevelTasks::FScheduler::ExecuteTask() [Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:172] Error: LowLevelTasks::FScheduler::TryExecuteTaskFrom<...>() [Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:350] Error: LowLevelTasks::FScheduler::WorkerMain() [Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:378] Error: UE::Core::Private::Function::TFunctionRefCaller<...>::Call() [Engine\Source\Runtime\Core\Public\Templates\Function.h:475] Error: FThreadImpl::Run() [Engine\Source\Runtime\Core\Private\HAL\Thread.cpp:67] Error: FRunnableThreadWin::Run() [Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:149] Error: FRunnableThreadWin::GuardedRun() [Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:79]
We don't have repro steps without the broken StaticMesh asset.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-193457 in the post.
| 1 |
| Component | UE - LD & Modeling - Modeling Tools - Mesh Editing |
|---|---|
| Target Fix | 31.00 |
| Fix Commit | 33494735 |
|---|
| Created | Aug 21, 2023 |
|---|---|
| Resolved | May 7, 2024 |
| Updated | May 28, 2024 |