Logical Filename

Question

Hi all,
We have a Z-transaction used to perform requests by using a DTP process and send them to a file (SAP schedules jobs automatically for doing this).
The name of this file should determined at runtime using a variable from the Z program.
We followed the instructions in this link: [/people/kumarrvr.seemakurti/blog/2009/03/06/dynamic-physical-file-path-creation-passing-selection-screen-variables-for-archive-job-file-names|/people/kumarrvr.seemakurti/blog/2009/03/06/dynamic-physical-file-path-creation-passing-selection-screen-variables-for-archive-job-file-names]
The configuration in FILE transaction is as follows:
Logical file: DAILY_AMDOCS_OUPUT
Physical file: ar.Sap_Day.<DATE>.output.<Y=POSTDT>
Logical path: ZDAILY_AMDOCS_FILE
Then we created a FM for populating the last part of the file name:
FUNCTION Y_FILENAME_EXIT_POSTDT.
*"*"Local Interface:
*"  EXPORTING
*"     VALUE(OUTPUT)
  DATA:
   g_pstdt type d,                   " posting date
   g_output  type char20.                " output
* posting date from the main program
  FIELD-SYMBOLS: <FS_PSTDT> type d.
  ASSIGN: ('(ZFIAMDYNAMICDTP_MAIN)WA_POSTDATE-POST_DATE') TO <FS_PSTDT>.
  g_pstdt =  <FS_PSTDT>.
*Pass posting date to the output if not initial
   if g_pstdt is not initial.
    g_output = g_pstdt.
    OUTPUT = g_output.
   endif.                              "
ENDFUNCTION.
Once the DTP is saved, the filename exit is triggered and set correctly the output value from the main program.
Then the job for generating physically the file is canceled. Looking into the dump log it states that the we are attempting to access an unassigned field symbol, making reference to the assignment from our main program in the above FM.
Therefore it looks like the job cannot access to our program+variable... and so far no way to find a solution.
If any of you have a clue about what we are missing, it would be very much appreciated.
Many thanks in advance.

Answer 1

Hi Suhas,
Thanks for your answer.
I remember that I already had given a try to that way but I have just tried again.
We modified accordingly the physical name in FILE transaction and called the FM like this:
CALL FUNCTION 'FILE_GET_NAME'
    EXPORTING
      logical_filename = 'DAILY_AMDOCS_OUPUT'
      parameter_1      = input_date
    EXCEPTIONS
      file_not_found   = 1
      OTHERS           = 2.
  IF sy-subrc <> 0.
  ENDIF.
The result now is ar.Sap_Day.20110825.output.
Posting date set as parameter 1 is not being appended to the filename.