Remove Solid Holes
Use the Defeature: Holes tool to remove solid holes in the model.
Note: This feature is not supported for a model with discrete
                geometry.
            
        - 
                From the Geometry ribbon, click the  tool.
                
Figure 1. 
 - Optional: 
                On the guide bar, click 
 to define settings used to
                    find and select holes of a specific size.
             - 
                On the guide bar, click Find.
                Holes in the model are selected and highlighted red.
 - 
                Review each found hole by clicking 
 and
                        
 on
                    the guide bar.
             - 
                Remove holes in the following ways:
                
- Remove all found/selected holes by clicking Remove All.
 - Remove individual holes by left-clicking.