If more than one ERRMSG keywords are active then the first will be active, because only one error message will be displayed at a time.

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Override with Printer file (OVRPRTF) command is used to override certain parameters of the printer files used in the program or to replace the printer file.

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Subfile record format(SFL), and subfile control record format(SFLCTL).

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OVRDTA keyword (field or record level) can be used to override the existing data contents of a field or record already on the display. OVRATR keyword (field or record level) can be used to override the existing display attributes of a field or record already on the display.

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This is used to specify rules for the Selection/Omission of records from a Physical File.

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Logical file that combines more than one physical file.Update is not possible through JLF.

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