In the distributed Batch option, all option panels select a CLIST that uses file tailoring services to generate the JCL job steps. (Only a CLIST or program can be selected from the option panel.) To obtain variables set from the panel and by program ISRJB2, the CLIST references the shared variable pool. The CLIST performs basic error checking on some of the variables associated with the panel fields. After generating the JCL, the CLIST returns to ISRJB2. If, because of some error condition, the CLIST does not generate a job step, a nonzero return code is returned to ISRJB2.