Copy duplicate all stories

[Anonymous]

Hi guys
So I have a plot of land and I want to put more than one house on it. How do I copy all the stories in one go to make a duplicate? have tried Merge a file and the Filter Elements in 3D in which I suppose should do this function. All miss out one or more stories in the copy.
Could anyone help in any way please.
Best
Fred

[Anonymous]

sounds like it may be a layer management issue - it appears u may have looked at this but make sure that all of the layers that u want to duplicate are on when copying with the heavy marquee.