Unable to provide Steps to Reproduce but the following will appear in the Output Log up to once per hour (on some days, it does not manifest at all). Never while PIE, usually when panning the graph but also when the editor is idle with no user activity:
LogUObjectBase: Warning: Object is not registered
LogStats: FPlatformStackWalk::StackWalkAndDump - 0.221 s
LogOutputDevice: Error: === Handled ensure: ===
LogOutputDevice: Error: Ensure condition failed: false [File:D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Editor\UnrealEd\Private\Kismet2\KismetDebugUtilities.cpp] [Line: 1029]
LogOutputDevice: Error: Error: Invalid (but non-null) property associated with pin; cannot get variable value
LogOutputDevice: Error: Stack:
LogOutputDevice: Error: [Callstack] 0x00000000535B2786 UE4Editor-Core.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000005335123A UE4Editor-Core.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000005336B906 UE4Editor-Core.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000004F2E32B6 UE4Editor-UnrealEd.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000004C6103AB UE4Editor-BlueprintGraph.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000004B413EBA UE4Editor-GraphEditor.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000004B2A74AC UE4Editor-GraphEditor.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000004B2AABF9 UE4Editor-GraphEditor.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000004B3D8225 UE4Editor-GraphEditor.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00000000501E7397 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00000000501ECE61 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x0000000050429913 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x0000000050243484 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000005021B68C UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000005020D6B7 UE4Editor-Slate.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x0000000056C7E39E UE4Editor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x0000000056C71A48 UE4Editor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x0000000056C803EC UE4Editor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x0000000056C6D5A9 UE4Editor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x0000000087151C24 USER32.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x000000008715156C USER32.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x0000000056C81516 UE4Editor-ApplicationCore.dll!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00000000E3FF50C8 UE4Editor.exe!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00000000E4005430 UE4Editor.exe!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00000000E40054AA UE4Editor.exe!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00000000E4012379 UE4Editor.exe!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x00000000E4013D57 UE4Editor.exe!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x0000000086EC8364 KERNEL32.DLL!UnknownFunction []
LogOutputDevice: Error: [Callstack] 0x0000000089717091 ntdll.dll!UnknownFunction []
LogStats: SubmitErrorReport - 0.000 s
LogStats: SendNewReport - 0.600 s
LogStats: FDebug::EnsureFailed - 0.826 s
LogUObjectBase: Warning: Object is not registered
LogSavePackage: Save=152.17ms
Following the breadcrumbs trail takes one here:
// Gets the watched tooltip for a specified site
FKismetDebugUtilities::EWatchTextResult FKismetDebugUtilities::GetWatchText(FString& OutWatchText, UBlueprint* Blueprint, UObject* ActiveObject, const UEdGraphPin* WatchPin)
{
FKismetDebugUtilitiesData& Data = FKismetDebugUtilitiesData::Get();
if (UProperty* Property = FKismetDebugUtilities::FindClassPropertyForPin(Blueprint, WatchPin))
{
if (!Property->IsValidLowLevel())
{
//@TODO: Temporary checks to attempt to determine intermittent unreproducable crashes in this function
static bool bErrorOnce = true;
if (bErrorOnce)
{
ensureMsgf(false, TEXT("Error: Invalid (but non-null) property associated with pin; cannot get variable value"));
bErrorOnce = false;
}
return EWTR_NoProperty;
}
What can be causing this? Is this something to worry about? Apart from looking scary, it does not seem to affect anything. Never seen this in 4.17 and below. Started after switching to 4.18.0. Currently using 4.18.1 under Win10.