Use the Edit menu > Show Duplicates command to verify that duplicates are included in the model and, if so, where they are located. Duplicate objects can be defined as objects of the same type (joints, frames, shells, Asolids, solids and so forth) that have the same coordinates in the model. If duplicate objects are unnecessary, the Edit menu > Show Duplicates command can be very useful in locating them so that they can be deleted or merged. Duplicates can not be drawn or created; they can result when data is imported from other programs, such as AutoCAD, CIS/2 Step and the like.
Click the Edit menu > Show Duplicates command. Any duplicate objects will be shown in different colors.