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To ensure the maximum efficiency of a program that uses POP_UP commands, and to stop any screen "flickering", force LANSA to use DFRWRT(*YES) in the associated IBM i display file by using either of the following declarative commands in the RDML program:            FUNCTION OPTIONS

     FUNCTION OPTIONS(*DEFERWRITE)

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     OPEN FILE(*ALL)

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 USE_OPTION(*ONDEMAND)

The significance of the DFRWRT(*YES) option on display files is discussed more fully in the section of this guide on performance considerations.