Hello! I’ve been making a 3D open world game in UE4. I have a somewhat decent AI. The AI can attack player, move to players position and rotate towards the player. Today I decided to improve the AI a bit. I tried to add some strafing etc but I did not get them to work the way I wanted, so I deleted the blueprints I made for the improved AI. After that I noticed that the AI doesn’t rotate towards the player anymore. I tried to find the reason for that but couldn’t find it. I thought maybe it was some bug in UE4 so I decided to restart it. After I restarted UE4 the “ThirdPersonExampleMap” opens up default for me, so I go to Content Browser and find my map. I double click to open it and UE4 crashes immediately. I am currently using version 4.24.3.
I also noticed if I try to open a blueprint class such as my character blueprint it also crashes UE4 but I can open other blueprints such as Animation blueprints. I have tried to delete the “Intermediate” and the “Saved” folders from the project folder but to no avail. I made a clone from my project but that didn’t help either. Updating to 4.25.1 did not help
Here is the crash report
[SPOILER]
FBlueprintCompilationManagerImpl::FastGenerateSkeletonClass(UBlueprint*, FKismetCompilerContext&, bool, TArray<FSkeletonFixupData, TSizedDefaultAllocator<32> >&)::$_53:Operator()(char16_t const*, TArray<UEdGraph*, TSizedDefaultAllocator<32> > const&, UField**&, bool, bool) const Address = 0x115f678cc (filename not found) [in UE4Editor-Kismet.dylib]
FBlueprintCompilationManagerImpl::FastGenerateSkeletonClass(UBlueprint*, FKismetCompilerContext&, bool, TArray<FSkeletonFixupData, TSizedDefaultAllocator<32> >&) Address = 0x115f5f7e7 (filename not found) [in UE4Editor-Kismet.dylib]
FBlueprintCompilationManagerImpl::FlushCompilationQueueImpl(bool, TArray<UBlueprint*, TSizedDefaultAllocator<32> >, TArray<UBlueprint, TSizedDefaultAllocator<32> >, FUObjectSerializeContext) Address = 0x115f5aa12 (filename not found) [in UE4Editor-Kismet.dylib]
FBlueprintCompilationManager::FlushCompilationQueue(FUObjectSerializeContext*) Address = 0x115f69184 (filename not found) [in UE4Editor-Kismet.dylib]
FScopedClassDependencyGather::~FScopedClassDependencyGather() Address = 0x105ba5a30 (filename not found) [in UE4Editor-CoreUObject.dylib]
FLinkerLoad::CreateExport(int) Address = 0x105d87fb1 (filename not found) [in UE4Editor-CoreUObject.dylib]
FLinkerLoad::IndexToObject(FPackageIndex) Address = 0x105d89995 (filename not found) [in UE4Editor-CoreUObject.dylib]
FLinkerLoad::CreateExport(int) Address = 0x105d85bd2 (filename not found) [in UE4Editor-CoreUObject.dylib]
FLinkerLoad::LoadAllObjects(bool) Address = 0x105d8a297 (filename not found) [in UE4Editor-CoreUObject.dylib]
LoadPackageInternal(UPackage*, char16_t const*, unsigned int, FLinkerLoad*, FArchive*, FUObjectSerializeContext*) Address = 0x105f20ce5 (filename not found) [in UE4Editor-CoreUObject.dylib]
LoadPackage(UPackage*, char16_t const*, unsigned int, FArchive*, FUObjectSerializeContext*) Address = 0x105f1e022 (filename not found) [in UE4Editor-CoreUObject.dylib]
ResolveName(UObject*&, FString&, bool, bool, unsigned int, FUObjectSerializeContext*) Address = 0x105f1b7f7 (filename not found) [in UE4Editor-CoreUObject.dylib]
StaticLoadObjectInternal(UClass*, UObject*, char16_t const*, char16_t const*, unsigned int, UPackageMap*, bool, FUObjectSerializeContext*) Address = 0x105f1e614 (filename not found) [in UE4Editor-CoreUObject.dylib]
StaticLoadObject(UClass*, UObject*, char16_t const*, char16_t const*, unsigned int, UPackageMap*, bool, FUObjectSerializeContext*) Address = 0x105ef8b45 (filename not found) [in UE4Editor-CoreUObject.dylib]
FAssetData::GetAsset() const Address = 0x1223128de (filename not found) [in UE4Editor-ContentBrowser.dylib]
SContentBrowser::OnAssetsActivated(TArray<FAssetData, TSizedDefaultAllocator<32> > const&, EAssetTypeActivationMethod::Type) Address = 0x1224fd895 (filename not found) [in UE4Editor-ContentBrowser.dylib]
TBaseSPMethodDelegateInstance<false, SContentBrowser, (ESPMode)0, TTypeWrapper<void> (TArray<FAssetData, TSizedDefaultAllocator<32> > const&, EAssetTypeActivationMethod::Type)>::Execute(TArray<FAssetData, TSizedDefaultAllocator<32> > const&, EAssetTypeActivationMethod::Type) const Address = 0x1225a968d (filename not found) [in UE4Editor-ContentBrowser.dylib]
TBaseSPMethodDelegateInstance<false, SContentBrowser, (ESPMode)0, void (TArray<FAssetData, TSizedDefaultAllocator<32> > const&, EAssetTypeActivationMethod::Type)>::ExecuteIfSafe(TArray<FAssetData, TSizedDefaultAllocator<32> > const&, EAssetTypeActivationMethod::Type) const Address = 0x1225a9718 (filename not found) [in UE4Editor-ContentBrowser.dylib]
SAssetView::OnListMouseButtonDoubleClick(TSharedPtr<FAssetViewItem, (ESPMode)0>) Address = 0x1224a2586 (filename not found) [in UE4Editor-ContentBrowser.dylib]
ZN21TMemberFunctionCallerI10SAssetViewMS0_Fv10TSharedPtrI14FAssetViewItemL7ESPMode0EEEEclIJRS4_EEEDTclpmdtdefpT3ObjdtdefpT9MemFunPtrspcl7ForwardIT_Efp_EEEDpOSA Address = 0x122552423 (filename not found) [in UE4Editor-ContentBrowser.dylib]
TBaseSPMethodDelegateInstance<false, SAssetView, (ESPMode)0, TTypeWrapper<void> (TSharedPtr<FAssetViewItem, (ESPMode)0>)>::Execute(TSharedPtr<FAssetViewItem, (ESPMode)0>) const Address = 0x12255222f (filename not found) [in UE4Editor-ContentBrowser.dylib]
TBaseSPMethodDelegateInstance<false, SAssetView, (ESPMode)0, void (TSharedPtr<FAssetViewItem, (ESPMode)0>)>::ExecuteIfSafe(TSharedPtr<FAssetViewItem, (ESPMode)0>) const Address = 0x1225522e9 (filename not found) [in UE4Editor-ContentBrowser.dylib]
TBaseDelegate<void, TSharedPtr<FAssetViewItem, (ESPMode)0> >::ExecuteIfBound(TSharedPtr<FAssetViewItem, (ESPMode)0>) const Address = 0x12242fdf4 (filename not found) [in UE4Editor-ContentBrowser.dylib]
SListView<TSharedPtr<FAssetViewItem, (ESPMode)0> >::Private_OnItemDoubleClicked(TSharedPtr<FAssetViewItem, (ESPMode)0>) Address = 0x12239c0e2 (filename not found) [in UE4Editor-ContentBrowser.dylib]
STableRow<TSharedPtr<FAssetViewItem, (ESPMode)0> >::OnMouseButtonDoubleClick(FGeometry const&, FPointerEvent const&) Address = 0x122432993 (filename not found) [in UE4Editor-ContentBrowser.dylib]
non-virtual thunk to STableRow<TSharedPtr<FAssetViewItem, (ESPMode)0> >::OnMouseButtonDoubleClick(FGeometry const&, FPointerEvent const&) Address = 0x122436802 (filename not found) [in UE4Editor-ContentBrowser.dylib]
FSlateApplication::RoutePointerDoubleClickEvent(FWidgetPath const&, FPointerEvent const&) Address = 0x106e0dd4e (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::ProcessMouseButtonDoubleClickEvent(TSharedPtr<FGenericWindow, (ESPMode)0> const&, FPointerEvent const&) Address = 0x106e0d17c (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::OnMouseDoubleClick(TSharedPtr<FGenericWindow, (ESPMode)0> const&, EMouseButtons::Type, FVector2D) Address = 0x106e0ca1a (filename not found) [in UE4Editor-Slate.dylib]
FMacApplication::ProcessMouseDownEvent(FDeferredMacEvent const&, TSharedPtr<FMacWindow, (ESPMode)0>) Address = 0x106d2e516 (filename not found) [in UE4Editor-ApplicationCore.dylib]
FMacApplication::ProcessEvent(FDeferredMacEvent const&) Address = 0x106d27ce2 (filename not found) [in UE4Editor-ApplicationCore.dylib]
FMacApplication::ProcessDeferredEvents(float) Address = 0x106d279ef (filename not found) [in UE4Editor-ApplicationCore.dylib]
FSlateApplication::TickPlatform(float) Address = 0x106ddc13f (filename not found) [in UE4Editor-Slate.dylib]
FSlateApplication::Tick(ESlateTickType) Address = 0x106ddb960 (filename not found) [in UE4Editor-Slate.dylib]
FEngineLoop::Tick() Address = 0x1047b84c8 (filename not found) [in UE4Editor]
GuardedMain(char16_t const*) Address = 0x1047c273f (filename not found) [in UE4Editor]
-[UE4AppDelegate runGameThread:] Address = 0x1047dc87f (filename not found) [in UE4Editor]
-[FCocoaGameThread main] Address = 0x104cd9f41 (filename not found) [in UE4Editor-Core.dylib]
Unknown() Address = 0x7fff387cb7a2 (filename not found) [in Foundation]
_pthread_start Address = 0x7fff7033c109 (filename not found) [in libsystem_pthread.dylib]
thread_start Address = 0x7fff70337b8b (filename not found) [in libsystem_pthread.dylib]
[/SPOILER]
It doesn’t seem to find some filename?