What Inventor version? As JD indicated, only structural designated type
components can be accessed in the FG. If you are on 2008, it is only
available through an Add-In.
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Dennis Jeffrey, Autodesk Inventor Certified Expert
Autodesk Manufacturing Implementation Certified Expert.
Instructor/Author/Sr. App Engr. Tel. (260) 399-6615
http://teknigroup.com