After migration to 4.10 launch crash the editor

Development Character & Animation
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1

After having converted the project from 4.9.2 to 4.10 when I start the Play button, it fails in

void UPathFollowingComponent::RecacheNavigationData()
{
	if (MovementComp != NULL)
	{
		const FNavAgentProperties& NavAgentProps = MovementComp->GetNavAgentPropertiesRef();

		if (ensure(GetWorld() && GetWorld()->GetNavigationSystem()))
		{
			MyNavData = GetWorld()->GetNavigationSystem()->GetNavDataForProps(NavAgentProps);
			// we should get something by now!
			ensure(MyNavData);
		}
	}
}

The var MyNavData is NULL.

Is there something to do with IA navigation ?

Txs,
D.

2

Hey -

Could you provide the callstack and the log files from the crash as well? I’m also not sure how you’re using the code snippet, can you reproduce the crash in a new project and if so, please include the steps that caused the crash.

Cheers

3

Some issue. Crash, when editor running from Xcode, then press Play. Map have only empty character on scene.

Thread 6#0	0x000000010c469f64 in UPathFollowingComponent::RecacheNavigationData() ()
#1	0x000000010c498b07 in TBaseUObjectMethodDelegateInstance<false, UPathFollowingComponent, void ()>::ExecuteIfSafe() const ()
#2	0x00000001019d0354 in TBaseMulticastDelegate<void>::Broadcast() const ()
#3	0x00000001025883ec in UNavigationSystem::OnWorldInitDone(FNavigationSystemRunMode) ()
#4	0x0000000101c5e240 in UGameInstance::StartPIEGameInstance(ULocalPlayer*, bool, bool, bool) ()
#5	0x0000000107bb7fe8 in UEditorEngine::CreatePIEGameInstance(int, bool, bool, bool, bool, float) ()
#6	0x0000000107bad746 in UEditorEngine::PlayInEditor(UWorld*, bool) ()
#7	0x0000000107b99b68 in UEditorEngine::StartQueuedPlayMapRequest() ()
#8	0x0000000107875758 in UEditorEngine::Tick(float, bool) ()
#9	0x0000000107f2c4dc in UUnrealEdEngine::Tick(float, bool) ()
#10	0x000000010001e602 in FEngineLoop::Tick() ()
#11	0x0000000100025fa3 in GuardedMain(wchar_t const*) ()
#12	0x0000000100034e3f in -[UE4AppDelegate runGameThread:] ()
#13	0x00000001001da9eb in -[FCocoaGameThread main] ()
#14	0x00007fff8dc73ee4 in __NSThread__start__ ()
#15	0x0000000109e5e815 in _pthread_body ()
#16	0x0000000109e5e792 in _pthread_start ()
#17	0x0000000109e5bfad in thread_start ()
4

same crash here.

5

I solved the problem by removing all IA with animation problems. I think the animation blueprints I was using were not compatible with version 4.10. Was working with 4.9.2

With a new project, I don’t have the problem. Since I think it was linked with these animation blueprints.

Txs,
D.

6

I had same “ensure” issue after migrating to 4.10. Deleting the only ACharacter I had placed in my map made the problem go away.