When i open blueprint it will crash!

Hi
i have project in 4.11 when i transfer my project to 4.13.1 and open any blueprint class it will crash many time with no reason
please help me how to fix this problem

here my bugs:

MachineId:596DA64141537BD5FEB8F2B46F6825DC
EpicAccountId:d727aa99106e416ba95cbd472d107721

Access violation - code c0000005 (first/second chance not available)

UE4Editor_Engine!UEdGraphSchema::BreakPinLinks() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\engine\private\edgraph\edgraphschema.cpp:552]
UE4Editor_BlueprintGraph!UEdGraphSchema_K2::BreakPinLinks() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\blueprintgraph\private\edgraphschema_k2.cpp:4099]
UE4Editor_Engine!UEdGraphSchema::BreakNodeLinks() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\engine\private\edgraph\edgraphschema.cpp:502]
UE4Editor_BlueprintGraph!UEdGraphSchema_K2::BreakNodeLinks() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\blueprintgraph\private\edgraphschema_k2.cpp:4085]
UE4Editor_UnrealEd!FBlueprintEditorUtils::RemoveNode() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\unrealed\private\kismet2\blueprinteditorutils.cpp:2834]
UE4Editor_BlueprintGraph!DeleteGeneratedNodesInGraph() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\blueprintgraph\private\k2node_mathexpression.cpp:30]
UE4Editor_BlueprintGraph!UK2Node_MathExpression::ClearExpression() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\blueprintgraph\private\k2node_mathexpression.cpp:2653]
UE4Editor_BlueprintGraph!UK2Node_MathExpression::RebuildExpression() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\blueprintgraph\private\k2node_mathexpression.cpp:2576]
UE4Editor_BlueprintGraph!UK2Node_MathExpression::ReconstructNode() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\blueprintgraph\private\k2node_mathexpression.cpp:2768]
UE4Editor_BlueprintGraph!UEdGraphSchema_K2::ReconstructNode() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\blueprintgraph\private\edgraphschema_k2.cpp:4120]
UE4Editor_UnrealEd!FBlueprintEditorUtils::ReconstructAllNodes() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\unrealed\private\kismet2\blueprinteditorutils.cpp:520]
UE4Editor_UnrealEd!FBlueprintEditorUtils::RegenerateBlueprintClass() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\unrealed\private\kismet2\blueprinteditorutils.cpp:1564]
UE4Editor_CoreUObject!FLinkerLoad::RegenerateBlueprintClass() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:383]
UE4Editor_CoreUObject!FLinkerLoad::FinalizeBlueprint() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\blueprint\blueprintsupport.cpp:1349]
UE4Editor_CoreUObject!FLinkerLoad::Preload() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3457]
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4125]
UE4Editor_CoreUObject!FLinkerLoad::IndexToObject() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4334]
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3821]
UE4Editor_CoreUObject!FLinkerLoad::IndexToObject() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:4334]
UE4Editor_CoreUObject!FLinkerLoad::CreateExport() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3821]
UE4Editor_CoreUObject!FLinkerLoad::CreateExportAndPreload() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2876]
UE4Editor_CoreUObject!FLinkerLoad::LoadAllObjects() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:3015]
UE4Editor_CoreUObject!LoadPackageInternalInner() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1218]
UE4Editor_CoreUObject!LoadPackageInternal() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1386]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImportInner() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2553]
UE4Editor_CoreUObject!FLinkerLoad::VerifyImport() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2308]
UE4Editor_CoreUObject!FLinkerLoad::Verify() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2091]
UE4Editor_CoreUObject!FLinkerLoad::FinalizeCreation() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:2001]
UE4Editor_CoreUObject!FLinkerLoad::Tick() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:705]
UE4Editor_CoreUObject!FLinkerLoad::CreateLinker() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linkerload.cpp:429]
UE4Editor_CoreUObject!GetPackageLinker() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\linker.cpp:644]
UE4Editor_CoreUObject!LoadPackageInternalInner() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1142]
UE4Editor_CoreUObject!LoadPackage() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:1400]
UE4Editor_CoreUObject!ResolveName() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:714]
UE4Editor_CoreUObject!StaticLoadObjectInternal() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:801]
UE4Editor_CoreUObject!StaticLoadObject() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:875]
UE4Editor_Kismet!FBlueprintEditor::LoadLibrariesFromAssetRegistry() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\kismet\private\blueprinteditor.cpp:1599]
UE4Editor_Kismet!FBlueprintEditor::CommonInitialization() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\kismet\private\blueprinteditor.cpp:1531]
UE4Editor_Kismet!FBlueprintEditor::InitBlueprintEditor() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\kismet\private\blueprinteditor.cpp:1667]
UE4Editor_Kismet!FBlueprintEditorModule::CreateBlueprintEditor() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\kismet\private\blueprinteditormodule.cpp:283]
UE4Editor_AssetTools!FAssetTypeActions_Blueprint::OpenAssetEditor() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\assettools\private\assettypeactions\assettypeactions_blueprint.cpp:84]
UE4Editor_UnrealEd!FAssetEditorManager::OpenEditorForAsset() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\unrealed\private\toolkits\asseteditormanager.cpp:338]
UE4Editor_AssetTools!FAssetTypeActions_Base::AssetsActivated() [d:\build\++ue4+release-4.13+compile\sync\engine\source\developer\assettools\public\assettypeactions_base.h:41]
UE4Editor_ContentBrowser!SContentBrowser::OnAssetsActivated() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\contentbrowser\private\scontentbrowser.cpp:1813]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,TTypeWrapper __cdecl(TArray const & __ptr64,enum EAssetTypeActivationMethod::Type)>::Execute() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:317]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,void __cdecl(TArray const & __ptr64,enum EAssetTypeActivationMethod::Type)>::ExecuteIfSafe() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:424]
UE4Editor_ContentBrowser!TBaseDelegate const & __ptr64,enum EAssetTypeActivationMethod::Type>::ExecuteIfBound() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:608]
UE4Editor_ContentBrowser!SAssetView::OnListMouseButtonDoubleClick() [d:\build\++ue4+release-4.13+compile\sync\engine\source\editor\contentbrowser\private\sassetview.cpp:3555]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,TTypeWrapper __cdecl(TSharedPtr)>::Execute() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:317]
UE4Editor_ContentBrowser!TBaseSPMethodDelegateInstance<0,SAssetView,0,void __cdecl(TSharedPtr)>::ExecuteIfSafe() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegateinstancesimpl.h:424]
UE4Editor_ContentBrowser!TBaseDelegate >::ExecuteIfBound() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\public\delegates\delegatesignatureimpl.inl:608]
UE4Editor_ContentBrowser!SListView >::Private_OnItemDoubleClicked() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\public\widgets\views\slistview.h:718]
UE4Editor_ContentBrowser!STableRow >::OnMouseButtonDoubleClick() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\public\widgets\views\stablerow.h:264]
UE4Editor_Slate!::operator()() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5293]
UE4Editor_Slate!FEventRouter::Route >() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:215]
UE4Editor_Slate!FSlateApplication::RoutePointerDoubleClickEvent() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5291]
UE4Editor_Slate!FSlateApplication::ProcessMouseButtonDoubleClickEvent() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5276]
UE4Editor_Slate!FSlateApplication::OnMouseDoubleClick() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:5254]
UE4Editor_Core!FWindowsApplication::ProcessDeferredMessage() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:1588]
UE4Editor_Core!FWindowsApplication::DeferMessage() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:1930]
UE4Editor_Core!FWindowsApplication::ProcessMessage() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:747]
UE4Editor_Core!FWindowsApplication::AppWndProc() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\windows\windowsapplication.cpp:669]
user32
user32
UE4Editor_Core!FWindowsPlatformMisc::PumpMessages() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:905]
UE4Editor!FEngineLoop::Tick() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2788]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\launch.cpp:156]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor!WinMain() [d:\build\++ue4+release-4.13+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

Hello TakeTimeGames,

If you still have your old version from 4.11, please try upgrading from 4.11 to 4.12.5 and then to 4.13.1 instead of doing a direct upgrade to 4.13. Also be sure to be on the lookout for any warnings, especially about nodes that be deprecated, while in the 4.12 version. It seems to be some kind of null pointer reference issue but I can’t tell exactly what is causing it from the callstack alone.

We haven’t heard from you in a while, TakeTimeGames. Are you still experiencing this issue? If so, was what I suggested in my previous comment of any help? In the meantime, I’ll be marking this issue as resolved for tracking purposes.

I am having this exact issue. I updated from 4.12.5 to 4.13.1 and now every time I try to open ANY blueprint (regardless of what class) I get a crash and the error code “Access violation - code c0000005 (first/second chance not available)”. This is not content related, because I tried to switch the blueprint files with backup blueprint files and the error occurs nonetheless. Before the update everything worked fine.

Could you provide the full callstack from the crash, ? Access violation errors usually involve a reference to a null pointer so there should be a way to fix this. Is this a code project or blueprint only?

Edit: If it’s the same callstack, it seems that other users having this issue previously found out that it was an issue with the math expression nodes they created. Could you try temporarily deleting any that you have prior to converting to see if they are causing the issue?