"Xref object" won't recognize new geometry after I xref object

[RTurner]

If I link a file using "Xref Object" It doesnt recognize new objects added to that file. Example

 

fixture--->xref object---->fixture layout

 

Make a fixture with 4 legs and a top, group all, and name "table".....xref this file into fixture layout to include the group and all objects. I then copy this fixture numerous times to create my layout. However If I go back to the fixture file and add new objects( like casters) the casters will not appear in the fixture layout file unless I delete table xref and start over to include the new casters. Then I have to re-lay the whole thing out again.... am I missing somthing here? Can you add the ability for the object xref to update all geometry in the file(or group), like xref scene?

 

Thanks