Running Execs in a Non-TSO/E Address Space

Because execs that run in a non-TSO/E address space cannot be invoked by the TSO/E EXEC command, you must use other means to run them. Ways to run execs outside of TSO/E are:

From a high level program using the IRXEXEC or IRXJCL processing routines.
From MVS™ batch with JCL that specifies IRXJCL in the EXEC statement.

TSO/E provides the TSO/E environment service, IKJTSOEV. Using IKJTSOEV, you can create a TSO/E environment in a non-TSO/E address space. You can then run REXX execs in the environment and the execs can contain TSO/E commands, external functions, and services that an exec running in a TSO/E address space can use. For information about the TSO/E environment service and how to run REXX execs within the environment, see z/OS TSO/E Programming Services.