Use the 
               		Impact > Impact Reports tab of the Project Options window to exclude repeated items from the Impact Subtree Report and to limit the depth of the
               trace in all reports. 
               	 
            
 
            	 
            
               -  
                  		  Choose 
                     			 Options > Project Options. The Project Options window opens. Click the Impact > Impact Reports tab.
                     		   
                  		
               
-  
                  		  Select 
                     			 Output duplicates in the SubTree report if you want to include repeated items in the Impact Subtree Report.
                     		   
                  		
               
-  
                  		  Select 
                     			 Limit Impact Depth if you want to limit the depth of the trace reported, then specify the maximum depth of the trace in the 
                     			 Max Depth combo box.