To initiate the system restart function press the RESTART key on the hardware operator's console or specify one of several restart actions on an operator frame. Refer to the hardware documentation for your system for more detailed information about your configuration. If the system has been quiesced or is in a valid restartable wait state, the system restarts and continues processing the interrupted unit of work. If the system had not been quiesced or is not in a valid restartable wait state then, depending upon your system configuration, the system displays either message IEA502A or BLW004A.
If the system does not recover as a result of your restart actions, follow your installation's procedures for recording system problems. When you have recorded the system information, consult with your system programmer before taking further action.