How to load blueprint from a .pak file

Hey,Guys.I got a question need to solve. I package a Bluepint (AActor) into a.pak file.when i mount the pak and load the blueprint by LoadObject method it return Null.But if i package a static mesh or a material into the .pak file i can load staticmesh and material anyone can help me?

Bump. I’m struggling with it also. My Blueprint is a child of a C++ UObject class.

@johnson111, @RVillani: Were you both able to load a blueprint from the Pak File?