How to keep a transformation after "set parent" if "clear and keep trasformation" doesn't work? I'm using Blender for architecture modeling and I'm having a problem with the clear parent command.
I made a fence repeating a mesh on a bezier curve with the "make parent" and follow the father.
Now I want to work on this fence in edit mode but I can't really do it, I can just change the initial object and it changes all the elements along the perimeter. 
I tried the command "clear and keep transformation" but it doesn't work as I expected. 

There is a way to turn my fence a mesh more editable?

I took 2 screenshots

before clear parent and keep transformation


after clear and keep transformation the elements are gone.
Shift + P   and choose Clear and Keep Transformation.