An ILE object may need to be changed for enhancements or for maintenance reasons. You can isolate what needs to be changed by using debugging information or the binder listing from the CRTPGM command. From this information you can determine what module needs to change, and often, what procedure or field needs to change.
In addition, you may want to change the optimization level or observability of a module or program. This often happens when you want to debug an program or module, or when you are ready to put a program into production. Such changes can be performed more quickly and use fewer system resources than re-creating the object in question.
Finally, you may want to reduce the program size once you have completed an application. ILE programs have additional data added to them which may make them larger than a similar OPM program.
Each of the above requires different data to make the change. The resources you need may not be available to you for an ILE program.
The following sections tell you how to