How to I can fix it Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address

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Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000021930000584

UnrealEditor_Core!mi_usable_size() [D:\build++UE5\Sync\Engine\Source\ThirdParty\mimalloc\2.0.0\src\alloc.c:549]
UnrealEditor_Core!mi_heap_realloc_zero_aligned_at() [D:\build++UE5\Sync\Engine\Source\ThirdParty\mimalloc\2.0.0\src\alloc-aligned.c:122]
UnrealEditor_Core!mi_realloc_aligned() [D:\build++UE5\Sync\Engine\Source\ThirdParty\mimalloc\2.0.0\src\alloc-aligned.c:188]
UnrealEditor_Core!FMallocMimalloc::Realloc() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\HAL\MallocMimalloc.cpp:155]
UnrealEditor_Core!FMemory::Realloc() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\HAL\FMemory.inl:118]
UnrealEditor_Core!TSizedHeapAllocator<32,FMemory>::ForAnyElementType::ResizeAllocation() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\ContainerAllocationPolicies.h:725]
UnrealEditor_QuadricMeshReduction!TArray<unsigned int,TSizedDefaultAllocator<32> >::ResizeGrow() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h:3121]
UnrealEditor_QuadricMeshReduction!TSet<TTuple<FName,FAttributesSetEntry>,TDefaultMapHashableKeyFuncs<FName,FAttributesSetEntry,0>,FDefaultSetAllocator>::FindIndexByHash() [D:\build++UE5\Sync\Engine\Source\Developer\MeshSimplifier\Private\MeshSimplify.h:238]
UnrealEditor_QuadricMeshReduction!FMeshSimplifier::EvaluateMerge() [D:\build++UE5\Sync\Engine\Source\Developer\MeshSimplifier\Private\MeshSimplify.cpp:643]
UnrealEditor_QuadricMeshReduction!FMeshSimplifier::Simplify() [D:\build++UE5\Sync\Engine\Source\Developer\MeshSimplifier\Private\MeshSimplify.cpp:1009]
UnrealEditor_NaniteBuilder!Nanite::FCluster::Simplify() [D:\build++UE5\Sync\Engine\Source\Developer\NaniteBuilder\Private\Cluster.cpp:400]
UnrealEditor_NaniteBuilder!Nanite::DAGReduce() [D:\build++UE5\Sync\Engine\Source\Developer\NaniteBuilder\Private\ClusterDAG.cpp:359]
UnrealEditor_NaniteBuilder!Nanite::FStripifier::ConstrainAndStripifyCluster'::2’::<lambda_3>::operator()() [D:\build++UE5\Sync\Engine\Source\Developer\NaniteBuilder\Private\ClusterDAG.cpp:288]
UnrealEditor_NaniteBuilder!ParallelForImpl::ParallelForInternal<TFunctionRef<void __cdecl(int)>,ParallelFor’::2'::<lambda_1>,std::nullptr_t>'::2’::FParallelExecutor::operator()() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Async\ParallelFor.h:116]
UnrealEditor_NaniteBuilder!LowLevelTasks::TTaskDelegate<LowLevelTasks::FTask * __ptr64 __cdecl(bool),48>::TTaskDelegateImpl<LowLevelTasks::FTask::Init<ParallelForImpl::ParallelForInternal<TFunctionRef<void __cdecl(int)>,ParallelFor'::2’::<lambda_1>,std::() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Async\Fundamental\TaskDelegate.h:171]
UnrealEditor_Core!LowLevelTasks::FTask::ExecuteTask() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Async\Fundamental\Task.h:627]
UnrealEditor_Core!LowLevelTasks::FScheduler::ExecuteTask() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:177]
UnrealEditor_Core!LowLevelTasks::FScheduler::WorkerMain() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:397]
UnrealEditor_Core!UE::Core::Private::Function::TFunctionRefCaller<LowLevelTasks::FScheduler::CreateWorker'::2’::<lambda_1>,void __cdecl(void)>::Call() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Public\Templates\Function.h:406]
UnrealEditor_Core!FThreadImpl::Run() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\HAL\Thread.cpp:69]
UnrealEditor_Core!FRunnableThreadWin::Run() [D:\build++UE5\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:149]

I’m getting an error fetching a large mesh file. How do I fix it? I need help

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2

Hey there @U_in1! Welcome to the community! How large of a mesh are we talking? It’s looking like you’re hitting some limits trying to put it into memory. Memory allocation errors like this can be tough to get around if you’re hitting some limits when it comes to size.

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