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UBoxComponent in UStaticMeshComponent and could not save map because Graph is linked to private object


I have problem. I'm getting erorr when saving map:

Can't save ../../../../../Documents/Unreal Projects/AAAxCaveMaster/Content/Maps/Map101.umap: Graph is linked to private object(s) in an external package.
External Object(s):

Problem is with pointer to UBoxComponent in UStaticMeshComponent (UTileStaticMeshComponent).
Basiclly TileStaticMeshComponent is same as UStaticMeshComponent.
TileStaticMeshComponent is used in Actor Object.

Below code TileStaticMeshComponent.h

 class AAAXCAVEMASTER_API UTileStaticMeshComponent : public UStaticMeshComponent
     UBoxComponent* BoxComponent;  // PROBLEM ////////////////////////////////////
     UTileStaticMeshComponent( const FObjectInitializer& ObjectInitializer );

Below code TileStaticMeshComponent.cpp

 UTileStaticMeshComponent::UTileStaticMeshComponent(const FObjectInitializer& ObjectInitializer )
     UBoxComponent* BoxPtr = CreateDefaultSubobject<UBoxComponent>( Name_BoxComponent );
     BoxPtr->SetBoxExtent( FVector(1.f, 1.f, 1.f) );
     BoxPtr->SetupAttachment( this );
     BoxComponent = BoxPtr; // PROBLEM ////////////////////////////////////////////
Product Version: UE 4.14
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asked Mar 02 '17 at 07:58 AM in C++ Programming

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avatar image Univise Mar 02 '17 at 05:45 PM

Try it with NewObject(this)

avatar image LUKASZJB Mar 02 '17 at 06:47 PM

Yeah, I moved BoxPtr/BoxComponent initialization from constructor to UTileStaticMeshComponent::BeginPlay and used NewObject instade of CreateDefaultSubobject.
This is working now, but maybe You know why? I mean what is wrong with earlier solution. What I don't understand.

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