4.18 Package Project Failed BuildData Error

I am working on a VR project, runs smoothly in editor but when i try to export exe Packge Project every time its stuck on UATHelper: Packaging (Windows (64-bit)): LogCook: Display: Cooking /Game/In3D/Maps/FinalMap_BuiltData → D:/Projects/ASTVR2/Saved/Cooked/WindowsNoEditor/ASTVR2/Content/In3D/Maps/FinalMap_BuiltData.uasset

I think there’s something wrong with the BuiltData. How can i resolve this error? BuiltData file size = 1.3GB

Any assistance would be most welcome!

Thanks,
Aasim