VMS Help  —  ON
    Performs a specified action when a command or program executed
    within a command procedure encounters an error condition or
    is interrupted by Ctrl/Y. The specified actions are performed
    only if the command interpreter is enabled for error checking or
    Ctrl/Y interrupts (the default conditions). Use the ON command
    only in a command procedure.


      ON  condition THEN [$] command
Additional Information: explode extract
Parameters Examples


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