Rational Developer for System z
Enterprise PL/I for z/OS, Version 3.8, Language Reference Manual

Scope of the ON-unit

The execution of an ON statement establishes an action specification for a condition. Once this action is established, it remains established throughout that block and throughout all dynamically descendent blocks until it is overridden by the execution of another ON statement or a REVERT statement or until termination of the block in which the ON statement is executed. (For information on dynamically descendent ON-units, refer to Dynamically descendent ON-units.)

When another ON statement specifies the same conditions:


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