UNavigationSystemV1 Crashing when played

Development Pipeline & Plugins
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1

UNavigationSystemV1 * navSys = UNavigationSystemV1::GetCurrent(GetWorld());

if (!navSys)
	return;

UNavigationPath * path =  navSys->FindPathToLocationSynchronously(
	GetWorld(),
	GetOwner()->GetActorLocation(),
	location,
	GetOwner());

if (GEngine)
	GEngine->AddOnScreenDebugMessage(-1, 10, FColor::Red, "NUL");

/*if (path->PathPoints.Num() <= 0)
	return;*/

/*for (int32 i = 0; i < path->PathPoints.Num(); i++)
{
	UKismetSystemLibrary::DrawDebugArrow(
		GetWorld(),
		i == 0 ? GetOwner()->GetActorLocation() : path->PathPoints[i - 1],
		path->PathPoints[i],
		20.0f,
		FLinearColor::Green,
		15.0f,
		20);
}*/

It seems like navSys->FindPathToLocationSynchrounously is the one crashing but I do not know what is wrong with it. I run it this function on begin play so i can check if it calculating path correctly. please help i’ve been stuck with this for hours. I tried to dissect the code but somehow there is something wrong with FindPathToLocationSynchrounously. I also checked how other people use this.

2

Is your owner and world set? make some null checks. When it crashes like that its usually because its null.

3

You’re welcome.

When working with pointers, always have null checks and check if classes are valid!

4

Hi, Thank you for replying! you were right. my owner returns null. I changed it to GetCharacter() because my class is a controller. what a dumb mistake. I’ve been stuck here for hours. thanks! :slight_smile: