You can automatically
attach object data records to objects in a drawing. For example,
you can convert block attribute data to object data and attach it
to objects in one operation.
First, you must create
the object data table to use for the new data. Then when you perform
the Generate Links operation, AutoCAD Map 3D automatically
records the existing data in the new object data table.
cannot create links to objects on layers that are locked, frozen,
or turned off.