Please, note that the post above is from February / 2014 => lots of things changed in 3 years!
In TFP, you have objects
, like chairs, tables, etc. And you have components and special objects
, like doors, windows, cabinets, accessories, etc.
This is a very important difference because the components have special properties. Specifically, the components are attached to the walls, therefore they can't be copied independently to another location.
However, there is a work around => create a small wall => attach the cabinet => select the cabinet + the wall => copy => paste.
Hope this helps