You can use IRXJCL to run a REXX exec in MVS™ batch. You can also call IRXJCL from a REXX exec or a program in any address space to run an exec.

A program can access IRXJCL using either the CALL or LINK macro instructions, specifying IRXJCL as the entry point name. You can obtain the address of the IRXJCL routine from the REXX vector of external entry points. Format of the REXX vector of external entry points describes the vector.