When you run on Language Environment and have either IGZETUN or IGZEOPT link-edited with your main program, Language Environment writes warning message IGZ0014W to the Language Environment MSGFILE each time a main program that contains IGZETUN or IGZEOPT is run. Writing the IGZ0014W message to the MSGFILE can cause a significant amount of additional system resource to be used. To suppress the writing of IGZ0014W, see Using CEEWUCHA.