A screen rule (SCR) is triggered when a screen change occurs on an External Product Interface (EPI) virtual terminal. The EPI permits CA OPS/MVS to communicate with any VTAM application that supports IBM 3270 type virtual terminals. For any EPI terminal defined to a VTAM application that can be set up to generate automatic screen updates, an SCR can be created to process these screen changes.
Do not design SCR rules that trigger from programmatic keystrokes entered to an EPI terminal by the ADDRESS EPI OPS/REXX environment. The ADDRESS EPI keystroke tools have mechanisms to trap and return the screen image so that you can programmatically manipulate the screen contents in the OPS/REXX program that issued the keystroke.
Note: For more information, see the Command and Function Reference.
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