To create an alias you use the Entry Point Mapper to emulate the alias function of an IBM mainframe linkage editor, which redirects the system to execute a program accessed via an alias name. To do this you must edit the entry name map file using a text editor.
At run time, your COBOL run-time system first looks for a program with the original name. If it finds one, it does not invoke the Entry Point Mapper.
Enter the alias on the [ENTRY-POINT] line and the actual program name on the [SUB-PROGRAM] line.