Seqence number in an outbound file

Question

Hi experts
I would like to send a sequence number in a file name and use the code below.
DATA: bla, bla, bla
selection-screen begin of block blk1 with frame title text-001.
parameters: P_FILE type string obligatory lower case.
selection-screen end of block blk1.
CALL FUNCTION 'NUMBER_GET_NEXT_SOP'
   EXEPTION
     nrrangenr              = NUMBERRANGENUMBER
     object                    = 'ZHR_SEQNR'
     quantity                 = '1'
    mandt                     = SY-MANDT
  IMPORTING
     number                  = ZSEQNR
CONCATENATE '/usr/sap/' zseqnr '_' sy-datum '.txt' into p_file.
select * from ..............
The parameters should look like /usr/sap/0000000001_20100511.txt but it looks like this /usr/sap/_20100511.txt
If i call the function modul above, further down, after i have done all the selections i get the sequence number but then it is to late, the parameter has already been set.
Anyone having any idea  //  Peter B

Answer 1

Hi,
I simulated your code with some changes & working properly
selection-screen begin of block blk1 with frame title text-001.
parameters: p_file type char256 obligatory lower case.
selection-screen end of block blk1.
data zseqnr(10) type n.
initialization. "You should put this piece of code at initialization event
  call function 'NUMBER_GET_NEXT_SOP'
    exporting
      nr_range_nr = '01'
      object      = 'ZTEST'             
      quantity    = '1'
      mandt       = sy-mandt
    importing
      number      = zseqnr.
  concatenate '/usr/sap/' zseqnr '_' sy-datum '.txt'    into   p_file.
start-of-selection.
  write :/ p_file.
Regards
Vinod