Blueprint assigned class member variables NULL during class constructor

Development Programming & Scripting Blueprint
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2

I have a member variable in my class:

	// Pointer to geometry pattern to apply
	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = GeomProcess)
	UStaticMesh *	GeometryMesh;

In the Blueprint defaults, I can assign a mesh to that variable as I want. However if I put a breakpoint in the class constructor I find that the GeomeryMesh is unassigned and always NULL.

// Constructor
UGeomComponent::UGeomComponent(const class FPostConstructInitializeProperties& PCIP)
	: Super(PCIP)
{
	// Process geometry
	if (GeometryMesh != NULL)
	{
	}
}

However if I later call a function on the class, from a Blueprint I notice that GeometryMesh is now assigned with the UStaticMesh * that I had set up in Blueprint.

How can I get access to the assigned member variables in the class constructor? Or perhaps I should be overloading another function and performing initialisation on member data at another point?