Warning CreateExport: Failed to load Outer for resource ... for many blueprints

Possible solution below.

Problem: At least in my case, this was because the editor was not recognizing a .cpp file that was serving as the parent class of a BP. Notably, the .cpp file existed on both Helix Core (Perforce/P4V) as well as my local machine.


  1. Open editor (yields CreateExport warning)
  2. Open a .cpp file
  3. Close editor
  4. Build from the IDE (e.g., in VS Community, Debug → Start Without Debugging)
    Should be solved… I also opened the problem level and saved for good measure, but I don’t think that matters.