- An EXEC CICS DELAY statement may sometimes produce a difference of one second. 
                  		
               
CICS file control has the following limitations: 
               	 
            
 
            	 
             
               		
               - Neither CICS- nor user-maintained data tables are supported. From an application programming point of view, this limitation
                  has little or no impact. From a systems programming perspective, you will not have the ability to eliminate disc I/O activity
                  by defining user-maintained tables.