Error handling routines

When an abnormal termination occurs, your command processor must be able to provide sufficient recovery to insure that the error condition does not cause the abnormal termination of a user's TSO/E session. Error handling routines give your command processor the ability to intercept an abend and allow it to clean up, bypass the problem, and if possible, attempt to retry execution.

A command processor must be able to recognize and respond to two types of abnormal terminations:

The command processor or a program at the same task level, such as command scan or the parse service routine, is terminating abnormally.
An attached subtask, such as a subcommand processor, is terminating abnormally.