F4 help for file selection

[Former Member]

Hi,

I have below code written to generate csv file.

parameters p_file like rlgrap-filename obligatory.

at selection-screen on value-request for p_file.

call function 'F4_FILENAME'    

     EXPORTING

          PROGRAM_NAME     =     SYST-CPROG

          DYNPRO_NUMBER    =     SYST-DYNNR

          FIELD_NAME              =     ' '

     IMPORTING

          FILE_NAME               =      p_file.

When I am going for F4 help, I can be able to put the name of file. But as soon as I put the name of the file and open it, program runs immediately. I won't get chance to hit F8 to execute. Also I have written code below to show some data on the output screen using write statement, this data also not showing.

Please can you tell me possible reasons?

Thanks.

[Former Member]

Hi

Have you inserted the event START-OF-SELECTION?

Max