Exit 44 gets control of a job at the end of conversion phase processing, in the JES2 main task. The processing for Exit 44 exit is unchanged in z/OS 2.1. However, because the IOTs are written and freed in the JES2CI address space, they are no longer available when Exit 44 gets control of a job. If your exit examines the IOTs, move this processing to the final Exit 6 call, after conversion has completed.