This guide describes how to write, compile, bind, run, debug, and maintain Integrated Language Environment® (ILE) COBOL compiler programs on the IBM® i. About ILE COBOL Programmer's Guide. Appendix G. Migration and Compatibility Considerations between OPM COBOL/400 and ILE. COBOL. ERserver iSeries WebSphere® Development Studio: ILE COBOL Programmer's Guide Version 5 SC09-2540-03 ERserver iSeries WebSphere® Development Studio: ILE [PDF] Introduction au développement sous COBOL/AS400 · [PDF] Programming IBM Rational Development Studio for i ILE COBOL · [PDF] ILE COBOL Programmer's Guide -Students learn the program development tools and operating system concepts which are essential to productive and proper programming in ILE COBOL/400.