Random crashes while editing BPs

Development Programming & Scripting
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1

My editor crashes regularly. One issue I often see is the following. I tried to look at the code but I can’t see what’s causing this. Would you be able to help?
This happens while clicking around inside a BP at what seems like random moments (right clicking, draging node etc.)

Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 771] Array index out of bounds: 16387 from an array of size 6

UnrealEditor_Renderer!FrustumCull() [D:\build\++UE5\Sync\Engine\Source\Runtime\Renderer\Private\SceneVisibility.cpp:676]
UnrealEditor_Renderer!`FVisibilityViewPacket::BeginInitVisibility'::`35'::<lambda_1>::operator()() [D:\build\++UE5\Sync\Engine\Source\Runtime\Renderer\Private\SceneVisibility.cpp:3401]
UnrealEditor_Renderer!UE::Tasks::Private::FTaskBase::TryExecuteTask() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Tasks\TaskPrivate.h:436]
UnrealEditor_Renderer!LowLevelTasks::TTaskDelegate<LowLevelTasks::FTask * __cdecl(bool),48>::TTaskDelegateImpl<`LowLevelTasks::FTask::Init<`UE::Tasks::Private::FTaskBase::Init'::`2'::<lambda_1> >'::`11'::<lambda_1>,0>::CallAndMove() [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:150]
UnrealEditor_Core!LowLevelTasks::FScheduler::TryExecuteTaskFrom<LowLevelTasks::TLocalQueueRegistry<1024>::TLocalQueue,&LowLevelTasks::TLocalQueueRegistry<1024>::TLocalQueue::DequeueGlobal,0>() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:350]
UnrealEditor_Core!LowLevelTasks::FScheduler::WorkerMain() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\Fundamental\Scheduler.cpp:378]
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:480]
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]

Thanks!

2

PS: I understand this but not sure if this is coming from one of my BPs and if so, which one. And “16387 from an array of size 6” looks odd.

3

It just happened again when I duplicated a BP node (pressed CTRL+D while a node is selected)

4

Hi there @Nimillion The array/out of bounds error is indicating that it’s trying to access something that it either doesn’t have permission or (Most commonly) doesn’t exist. I’d check anything you have those BP’s attached to or directed to and ensure they’re not linked to any other assets that no longer exist.