The converter/interpreter (C/I) scheduling module IATIICS calls this exit routine after JES3 selects an address space for a job's C/I processing. IATUX49 enables you to accept or reject the address space selected. JES3, or your installation if installation exit IATUX46 is used, has already determined which mains are eligible for C/I processing of the job.

For example, you may have certain large jobs that have a large number of DD statements and should run only in the FSS address space or you may have jobs that require fast turn-around and should run in the JES3 global address space. If JES3 selects an address space for the C/I processing for the job, you can use IATUX49 to reject JES3's choice. JES3 then goes through the selection process once more, and calls IATUX49 with a different address space. When JES3 finally selects the address space you want for the job, then your exit can accept it, and C/I processing will proceed.

From the information given on entry to the exit routine, you can determine which address space JES3 has selected to process a job's JCL. By using the return codes defined below, you indicate whether you accept or reject JES3's selection of the address space.

If the installation does not define any C/I FSS address spaces, JES3 marks this exit routine as a dummy at initialization and never calls it, because with no C/I FSSs, C/I processing will occur in the JES3 address space on the global main.