You would want to step backward from the point of an abend to determine the cause of the abend condition. The Statement Trace option lets you step through the program execution in reverse order.
Stepping back in reverse order does not mean that you run the program in a reverse manner or reverse the program execution. It means that you just retrace the steps done previously. The Statement Trace option does not affect the point at which the program resumes execution.
The Statement Trace view displays program statements in the order of their execution. The Statement Trace view provides the same Step Forward and Step Back actions that are available on the InterTest Debug view. For more information, see the Statement Trace view and InterTest Debug view. To initiate the Step Forward and Step Back icons, you must activate Statement Trace option to monitor data. For more information about activating Statement Trace and monitoring data, see Sessions.