You can set notifications for ON-units in CodeWatch, either from the command line or from GUI CodeWatch. 
               	 
            
 
            	 
            
               Using Command-line CodeWatch
 
               		 
               		
                
                  		  
                  - Use the CATCH command to turn notification on for a specified ON-unit. 
                     		  
                  
- Use the NCATCH command to turn notification off for a specified ON-unit. 
                     		  
                  
-  Use the LCATCH command to list the catch status of a specified ON-unit/signal, or the state of all signals and ON-units.
                     
                     		  
                  
See the help topics for the CATCH, NCATCH, and LCATCH commands for details and examples of using these commands. 
                  		
               
 
               	 
              
            	 
            
               Using GUI CodeWatch
 
               		 
               		
               While debugging your PL/I program in GUI CodeWatch, do the following to set notification for specific ON-units: 
                  		
               
 
               		
                
                  		  
                  - Choose 
                     			 . The Configure On Unit Exceptions dialog box appears with the supported ON-units. 
                     		  
                  
- Select the check box of the supported ON-units for which you want to turn on notification, and clear the check box of the
                     supported ON-units for which you want to turn off notification. 
                     		  
                  
- Click 
                     			 OK.