Parapet wall on shed roof

[FoldingRuler]

Ive been trying to create a parapet wall on shed roof.  Ive been following report KB00120 and KB00295.  Both of which go through the same explanation.  The result I get is a railing and a transparent wall.  There is no way to use eyedropper to transfer material to the new object.  In my case, I want the parapet railing to be parallel with the flat ceiling of the shed roof.  I am not using the flat ceiling in my 1st story model but using a sloped ceiling plane.  On my 2nd floor i'm using a ceiling of 55" and a half wall height of 48.  I followed the KB reports precisely (I thought) and it doeswn't seem to generate the correct parapet wall.

 

Any help is appreciated.

 

Using Pro 2021