Application stubs

The stub modules that are link-edited with applications and exits (CSQASTUB, CSQBRSSI, CSQBRSTB, CSQBSTUB, CSQCSTUB, CSQQSTUB, and CSQXSTUB) might not work with earlier versions of the queue manager. For example, stubs supplied with V2.1 can be used by applications running on a Version 2.1, 5.2, 5.3, or 5.3.1 queue manager; however, if the application is run on a V1.2 queue manager, it might not work, or might end abnormally.