AutoCAD 2010/2011/2012 DWG Format

[#1]

I work in a visualization company, and we have several clients who send us DWG files which they have exported from Revit. We have asked them to export to Solids, but in the DWG file in several location the are Body objects. The whole point of doing this is so that we can manipulate the solids (mostly by unions) to eliminate overlaping surfaces. The Body objects we can't do anything with.

Does anyone know if we can convert the body object to a solid? Or is there some way we can eliminate the problem from Revit.

[#2]

I don't know anything about Revit, but I have Stitched Body objects into solids in Inventor. I assume Inventor fusion will do the same.

I doubt you will get anywhere in AutoCAD.
Can you attach an example Body (preferably in the Inventor forum).