Merge Different Spools containing a Single PDF page into a Single PDF file.

Question

Greetings,
I am developing a custom object where in i need to read PDF file from many different Spools(Range given on Input Screen), where each spool has a single PDF page in it. I need to combine all these PDF Pages into a single PDF file & either create a new Spool or save it on an Application Server.
At present i have developed the code where in i am able to read the PDF files from different spools & convert them into Binary but i am not able to generate it back to PDF file.
Kindly find my code for your reference.
CODE:-
START-OF-SELECTION.
  PERFORM f_get_spool_1000 .
  PERFORM g_conv_pdf_to_bin_2000 .
*&      Form  F_GET_SPOOL_1000
      text
FORM f_get_spool_1000 .
  SELECT * FROM tsp01
           INTO TABLE gt_tsp01
           WHERE rqident IN s_spool
           ORDER BY rqcretime DESCENDING.
  IF sy-subrc = 0.
    SORT gt_tsp01 BY rqident .
  ENDIF.
ENDFORM.
*&      Form  G_CONV_PDF_TO_OTF_2000
      text
DATA: lv_filename_out   TYPE string,
            lv_len            TYPE i,
            lt_tab            TYPE tsfixml .
  DATA: lwa_print_parms    LIKE pri_params,
              lv_valid(1)       TYPE c .
  DATA: lv_linsz LIKE sy-linsz VALUE 132, " Line size
              lv_paart LIKE sy-paart VALUE 'X_65_132'.  " Paper Format
  DATA : lt_tsp01 TYPE STANDARD TABLE OF tsp01 ,
               lwa_tsp01 TYPE tsp01 .
  CLEAR : gv_pdf, gwa_tsp01, gv_renderpagecount .
  LOOP AT gt_tsp01 INTO gwa_tsp01.
    CALL FUNCTION 'FPCOMP_CREATE_PDF_FROM_SPOOL'
      EXPORTING
        i_spoolid         = gwa_tsp01-rqident
        i_partnum         = 1
      IMPORTING
        e_pdf             = gv_pdf
        e_renderpagecount = gv_renderpagecount
        e_pdf_file        = gv_pdf_file
      EXCEPTIONS
        ads_error         = 1
        usage_error       = 2
        system_error      = 3
        internal_error    = 4
        OTHERS            = 5.
    IF sy-subrc <> 0.
      MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno
              WITH sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
    ENDIF.
    CLEAR lv_len .
    REFRESH gt_bin .
    CALL FUNCTION 'SCMS_XSTRING_TO_BINARY'
      EXPORTING
        buffer        = gv_pdf
      IMPORTING
        output_length = lv_len
      TABLES
        binary_tab    = gt_bin.
    CLEAR gwa_bin .
    LOOP AT gt_bin INTO gwa_bin.
      APPEND gwa_bin TO gt_listout.
      CLEAR gwa_bin .
    ENDLOOP.
  ENDLOOP.
Get FP reference
  DATA: lo_fp     TYPE REF TO if_fp VALUE IS INITIAL,
        lo_pdfobj TYPE REF TO if_fp_pdf_object VALUE IS INITIAL,
        lo_exc    TYPE REF TO cx_root,
        lv_xslt_message TYPE string .
  lo_fp = cl_fp=>get_reference( ).
For handling exceptions
  DATA: lo_fpex TYPE REF TO cx_fp_runtime VALUE IS INITIAL.
  TRY.
      lo_pdfobj = lo_fp->create_pdf_object( connection = 'ADS' ).
  Set document
      lo_pdfobj->set_document(
        EXPORTING
          pdfdata = gt_listout ).
  Tell PDF object to extract data
      lo_pdfobj->set_extractdata( ).
  Execute the call to ADS
      lo_pdfobj->execute( ).
    CATCH cx_root INTO lo_exc.
      lv_xslt_message = lo_exc->get_text( ).
  ENDTRY.
Your quick reply would be of great help.
Regards.

Answer 1

Thank Your for your concern, there are many replies & posts but all of them points only to Try what they have said. As being said that trying to convert PDF to binary & appending many PDF similarly would not let you generate a single PDF again.
Your Kind guidance would be really appreciable.
Regards.