IOF can not display a null sysout data set on the Job Summary when its JES2 control block has been deleted. Due to its control block structure, JES2 will typically discard some, but not all of these null data sets, creating a very confusing display on the IOF Job Summary. To avoid this possible confusion, IOF fixes U8A2283 (for release 8A) and U8B2283 (for release 8B) were written. This change is already incorporated into release 8C. The fixes change IOF so that sysout data sets are not displayed on the on the IOF Job Summary until they have been opened and written to.