The initialization and termination routines (IRXINIT and IRXTERM) are programming routines that you can call to initialize and terminate language processor environments. Although they are primarily intended for use in the non-TSO/E address spaces, you can also use them in TSO/E.

IRXINIT gives you the flexibility to define your own environment, and therefore, customize how execs run within the environment. When you call IRXINIT, you specify all the characteristics you want defined for the language processor environment. However, because a language processor environment is always automatically initialized in any address space, you may have no need to use IRXINIT to initialize an environment. If you use IRXINIT to initialize a language processor environment, use IRXTERM to terminate the environment. describes IRXINIT and IRXTERM.