yes lcoate68 had right,
but I mean In this way to keep your model in parametic shape.
Another way is to make another file (new part file) and use
the function
DATA Sharing -> ExtCopyGeom (external copy geometry), choose open (then open your original file), use CSYS for orientation (corelation between those two file) after that choose surfaces ref. -> define -> Solid surf (from previous model - to take all solid shape). ... or in this way you can copy another kind of geometry (edges, Datums, curves).
This function has a very powerfull option:
Dependent geometry - when you will stil have conection with previous file
and
Independent geometry - when you broke all relation with previous part.
All imported geometry is on surfeces. You can make this for take a part of your previous file or all the file.
... but !!! Yes it is a but
in this function is not available on Fundation basic module.
Please take a look if you have SHARED DATA enable (on Insert menu)
I hope this will help you.