Error when loading 6 children but not 5

Thanks for looking at my post!

Do you know of why it would be that I can only load 5 assets from the library and not 6?

I have a main class in which I load a StageElements class. the StageElements class has the 6 objects. when I take out one of the objects it loads fine. but I put it back and it tells me:


TypeError: Error #1009: Cannot access a property or method of a null object reference.
      at asFiles.projectOne: :StageElements/loadBackground()
      at asFiles.projectOne: :StageElements()
      at asFiles.projectOne: :ProjectOne/loadStageElements()
      at asFiles.projectOne: :ProjectOne()

when addChild for 5 different objects they load fine onto the stage when I publish. but then I add a 6th object and it tells me that error. this has been driving me bonkers all day! :frowning:

any help much much appreciated!!!

PS: each of the children work because they all work independently.