- 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.