Restriction: The run-time switches and run-time tunables are supported for native COBOL only. 
	 
 
 
	 You can configure the COBOL run-time system environment to ensure it behaves appropriately for an application, regardless of the configuration used by other COBOL applications. 
	 
	 Run-time behavior can be controlled using environment variables, 
		a run-time launch configuration file (Windows only), 
		run-time tunables, and run-time switches. 
	 
 
	  
		You can specify some run-time features from within the IDE, as well as in a separate configuration file: 
		
 
		 
		  - From the IDE - Setting certain run-time features in the IDE generates a binary format file. Eclipse creates a .gcf file that contains the run-time settings when you run the application.
 
 
		  - A separate configuration file - In a text editor, create or edit a separate text file. See the individual sections for the formats of the text files. Use the 
			 COBCONFIG_ (Windows) or 
			 COBCONFIG (UNIX) environment variable to specify the location and name of the run-time configuration file for environment variables, tunables, and switches.