Passing Nested internal table to GUI_DOWNLOAD

Hi All
I have got a nested internal table, I want this whole report in excel format, I tried using GUI_DOWNLOAD , it gives error. Does any body have any idea how can I solve this.
regards
AJ

Hi,
I think nested and deep structure internal tables will not work with gui_download.
you need to convert before giving it to gui_download
aRs

Similar Messages

Use 3 internal table in GUI_Download

Hello expert,
i have 3 internal table: gt_header, gt_body and gt_footer. how can i used all 3 in gui_download fm. here is my sample code:
CALL FUNCTION 'GUI_DOWNLOAD'
    EXPORTING
      filename              = gv_file_name
      filetype              = 'ASC'
    TABLES
      data_tab              = gt_header.
here i can only pass one internal table.
Help please?

Hi Hassim,
Maybe you can declare another internal table, with all fields is type C and length as you wanted.
Loop those three itabs, append to this new itab. then call this FM download.
regards,
Archer

Passing dynamic internal table into ALV

I have made one ALV report where i had created one button 'GENERATE'. ON CLICKING THIS BUTTON the data in the ALV report is downloaded to excel file.
i have used this:-
CALL METHOD cl_gui_frontend_services=>file_save_dialog
 EXPORTING
 window_title = l_title
 default_extension = 'XLS'
 initial_directory = 'C:\'
 CHANGING
 filename = filename
 path = path
 fullpath = fullpath
 user_action = user_action
 EXCEPTIONS
 cntl_error = 1
 error_no_gui = 2
 not_supported_by_gui = 3
 OTHERS = 4.
IF sy-subrc <> 0.
 EXIT.
ENDIF.
Check which button is pressed
IF user_action <> cl_gui_frontend_services=>action_ok.
 EXIT.
ENDIF.
Download error data collected from the internal table
CALL METHOD cl_gui_frontend_services=>gui_download
 EXPORTING
 filename = fullpath
 filetype = 'ASC'
 write_field_separator = '#'
 codepage = '4103'
 write_bom = c_true
 CHANGING
 data_tab = gi_final
 EXCEPTIONS
 file_write_error = 1
 no_batch = 2
 gui_refuse_filetransfer = 3
 invalid_type = 4
 no_authority = 5
 unknown_error = 6
 header_not_allowed = 7
 separator_not_allowed = 8
 filesize_not_allowed = 9
 header_too_long = 10
 dp_error_create = 11
 dp_error_send = 12
 dp_error_write = 13
 unknown_dp_error = 14
 access_denied = 15
 dp_out_of_memory = 16
 disk_full = 17
 dp_timeout = 18
 file_not_found = 19
 dataprovider_exception = 20
 control_flush_error = 21
 not_supported_by_gui = 22
 error_no_gui = 23
 OTHERS = 24.
If selection is successful
IF sy-subrc EQ 0.
 MESSAGE s004 . " File created successfully
ELSE.
 MESSAGE i005 . " File is not created successfully
ENDIF.
In the table i have passed the internal table . this is working fine.
But,
The problem is if i want to display the data in diferent layout based on selection screen criteria the data downloaded are same as default layout.
how to pass a dynamic internal table in the
CALL METHOD cl_gui_frontend_services=>gui_download

Hi ,
here is the Program for Download
REPORT yrs_download_transport_request.
PARAMETERS:
p_reqest TYPE trkorr OBLIGATORY,
p_folder(255) TYPE c LOWER CASE, p_sepr OBLIGATORY.
DATA:
folder TYPE string,
retval LIKE TABLE OF ddshretval WITH HEADER LINE,
fldvalue LIKE help_info-fldvalue,
transdir TYPE text255,
filename(255),
trfile(20) TYPE c,
datatab TYPE TABLE OF text8192 WITH HEADER LINE,
len TYPE i,
flen TYPE i.
TYPE-POOLS: sabc, stms, trwbo.
INITIALIZATION.
CONCATENATE sy-sysid 'K*' INTO p_reqest.
IF sy-opsys = 'Windows NT'.
 p_sepr = ''.
ELSE.
 p_sepr = '/'.
ENDIF.
* CALL FUNCTION 'WSAF_BUILD_SEPARATOR'
* IMPORTING
* separator = p_sepr
* EXCEPTIONS
* separator_not_maintained = 1
* wrong_call = 2
* wsaf_config_not_maintained = 3
* OTHERS = 4.
* IF sy-subrc NE 0.
* MESSAGE s001(00)
* WITH
* 'Unable to find out the separator symbol for the system.'(011).
* ENDIF.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_reqest.
DATA:
 tt_system TYPE TABLE OF tmscsys WITH HEADER LINE,
 es_selected_request TYPE trwbo_request_header,
 es_selected_task TYPE trwbo_request_header,
 iv_organizer_type TYPE trwbo_calling_organizer,
 is_selection TYPE trwbo_selection.
iv_organizer_type = 'W'. is_selection-reqstatus = 'R'.
CALL FUNCTION 'TR_PRESENT_REQUESTS_SEL_POPUP'
 EXPORTING
 iv_organizer_type = iv_organizer_type
 is_selection = is_selection
 IMPORTING
 es_selected_request = es_selected_request
 es_selected_task = es_selected_task.
p_reqest = es_selected_request-trkorr.
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_folder.
DATA: title TYPE string.
title = 'Select target folder'(005).
CALL METHOD cl_gui_frontend_services=>directory_browse
 EXPORTING
 window_title = title
 CHANGING
 selected_folder = folder
 EXCEPTIONS
 cntl_error = 1
 error_no_gui = 2
 OTHERS = 3.
CALL FUNCTION 'CONTROL_FLUSH'
 EXCEPTIONS
 cntl_system_error = 1
 cntl_error = 2
 OTHERS = 3.
p_folder = folder.
AT SELECTION-SCREEN ON p_reqest.
DATA: request_info TYPE stms_wbo_request,
 request_infos TYPE stms_wbo_requests.
REFRESH request_infos.
CALL FUNCTION 'TMS_MGR_READ_TRANSPORT_REQUEST'
 EXPORTING
 iv_request = p_reqest
 iv_header_only = 'X'
 IMPORTING
 et_request_infos = request_infos
 EXCEPTIONS
 read_config_failed = 1
 table_of_requests_is_empty = 2
 system_not_available = 3
 OTHERS = 4.
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 request_info.
READ TABLE request_infos INTO request_info INDEX 1.
IF sy-subrc NE 0
OR request_info-e070-trkorr IS INITIAL.
 MESSAGE e398(00) WITH 'Request'(006) p_reqest 'not found'(007).
ELSEIF request_info-e070-trstatus NE 'R'.
 MESSAGE e398(00)
 WITH 'You must release request'(008)
 request_info-e070-trkorr
 'before downloading'(009).
ENDIF.
START-OF-SELECTION.
folder = p_folder.
CONCATENATE p_reqest+3(7) '.' p_reqest(3) INTO trfile.
CALL FUNCTION 'RSPO_R_SAPGPARAM'
 EXPORTING
 name = 'DIR_TRANS'
 IMPORTING
 value = transdir
 EXCEPTIONS
 error = 0
 OTHERS = 0.
PERFORM copy_file USING 'cofiles' trfile.
trfile(1) = 'R'.
PERFORM copy_file USING 'data' trfile.
trfile(1) = 'D'.
PERFORM copy_file USING 'data' trfile.
* FORM copy_file *
* --> SUBDIR * * --> FNAME *
FORM copy_file USING subdir fname.
DATA:
 auth_filename TYPE authb-filename,
 gui_filename TYPE string.
CONCATENATE transdir subdir fname
 INTO filename
 SEPARATED BY p_sepr.
REFRESH datatab.
CLEAR flen.
auth_filename = filename.
CALL FUNCTION 'AUTHORITY_CHECK_DATASET'
 EXPORTING
 activity = sabc_act_read
 filename = auth_filename
 EXCEPTIONS
 no_authority = 1
 activity_unknown = 2
 OTHERS = 3.
IF sy-subrc <> 0.
 FORMAT COLOR COL_NEGATIVE.
 WRITE: / 'Read access denied. File'(001),
 filename.
 FORMAT COLOR OFF. EXIT.
ENDIF.
OPEN DATASET filename FOR INPUT IN BINARY MODE.
IF sy-subrc NE 0.
 FORMAT COLOR COL_TOTAL.
 WRITE: / 'File open error'(010), filename.
 FORMAT COLOR OFF. EXIT.
ENDIF.
DO.
 CLEAR len.
 READ DATASET filename INTO datatab LENGTH len.
 flen = flen + len.
 IF len > 0. APPEND datatab. ENDIF.
 IF sy-subrc NE 0.
 EXIT.
 ENDIF.
ENDDO.
CLOSE DATASET filename.
CONCATENATE p_folder '' fname INTO gui_filename.
CALL METHOD cl_gui_frontend_services=>gui_download
 EXPORTING
 bin_filesize = flen
 filename = gui_filename
 filetype = 'BIN'
 CHANGING
 data_tab = datatab[]
 EXCEPTIONS
 file_write_error = 1
 no_batch = 2
 gui_refuse_filetransfer = 3
 invalid_type = 4
 no_authority = 5
 unknown_error = 6
 header_not_allowed = 7
 separator_not_allowed = 8
 filesize_not_allowed = 9
 header_too_long = 10
 dp_error_create = 11
 dp_error_send = 12
 dp_error_write = 13
 unknown_dp_error = 14
 access_denied = 15
 dp_out_of_memory = 16
 disk_full = 17
 dp_timeout = 18
 file_not_found = 19
 dataprovider_exception = 20
 control_flush_error = 21
 OTHERS = 24.
IF sy-subrc = 0.
 WRITE: / 'File'(002), filename, 'downloaded. Length'(003), flen.
ELSE.
 FORMAT COLOR COL_NEGATIVE.
 WRITE: / 'File download error. Filename:'(004), filename.
 FORMAT COLOR OFF.
ENDIF.
ENDFORM. "copy_file
Reward points if it is usefull....
Girish

Nested Internal Table Tables and REUSE_ALV_GRID_DISPLAY

Can you display entries from a nested internal table in the using the call function 'REUSE_ALV_GRID_DISPLAY'?
Types and internal tables are below. I have skimmed the code for the function module below, assume field category built, etc.. The table is in the tables portion of the function module, the nested internal table is inside of int_output defined as data: int_tlines type t_tline occurs 0.
TYPES:
BEGIN OF t_tline,
tdformat type tline-tdformat,
tdline type tline-tdline,
END OF t_tline.
DATA:
BEGIN OF int_output occurs 0,
qmnum       TYPE qmnum,
sys_stat    TYPE j_stext,
kunum       TYPE qkunum,
sting       TYPE string,
numr        TYPE vbeln,
bstnk       TYPE bstkd,
vbeln       TYPE kdauf,
erdat(10)   TYPE c,
aufnr       TYPE aufnr,
werks       TYPE werks_d,
idat2(10)   TYPE c,
otgrp       TYPE otgrp,
oteil       TYPE oteil,
fd_text     TYPE qtxt_code,
fegrp       TYPE fegrp,
fecod       TYPE fecod,
pb_text     TYPE qtxt_code,
fetxt       TYPE fetxt.
data: int_tlines type t_tline occurs 0.
data: QMTXT TYPE QMEL-QMTXT,
NOTIF_TXT   TYPE STRING,
bautl       TYPE bautl,
bautx       TYPE bautx,
END OF int_output.
DATA: i_output      LIKE STANDARD TABLE OF int_output,
w_output      LIKE LINE OF int_output.
CALL FUNCTION 'REUSE_ALV_GRID_DISPLAY'
    EXPORTING
    TABLES
      t_outtab                 = int_output
    EXCEPTIONS
      program_error            = 1
      OTHERS                   = 2.

Hi
I dont think this requirement is possible. Even if we pass the data through the nested internal table the FM may not give a dump. The main problem will be with field catalog. How can we build field catalog for the fields inside the nested internal table.
Field catalog for this FM REUSE_ALV_GRID_DISPLAY should be of type SLIS_FIELDCAT_ALV and this is a standard one.

Passing a internal table from method

Hi All,
 I am using Object Oriented Programming in my program.
 I want to pass a Internal Table from a method calling statement written in a start-of-selection.
 Can any one give me the syntax for
1. Declaring a method with importing parameter as internal table.
2. Syntax for Method Implementation
3. Syntax for calling the method from start-of-selection.
helpful answers are rewarded.
Regards,
Azaz Ali.

Hi,
Calling Method is similar to calling function Module.
CALL METHOD cl_gui_frontend_services=>gui_download
 exporting
 filename =
IMPORTING
 FILELENGTH =
changing
 data_tab = ( this is ur internal table name )* EXCEPTIONS
 FILE_WRITE_ERROR = 1.
In OO ABAP u avoid creating table with header line
Best way to call method is to use PATTERN Button
1) Click Pattern Button
2) Select Abap Object Pattern
3) Enter
4) Select Call Method
5) Enter instance name ( i. e used for create object ) ( No need for static method like gui_download )
6) Enter Class / Interface name
7) Enter Method Name
done.
passing value to method is similar to FM.
Creating internal table for Method
any TYPE ........SAY TY_Intern
Then Syntax Should Be
DATA : OO_INTERNAL_TABLe type table of TY_Intern.
pass this to the Method.
Hope This will solve ur problem.
Please Mark Helpful Answers
Message was edited by: Manoj Gupta

How to Pass the Internal table of a report to Smart Form

Hi Experts,
I have one report in which from selection screen i am getting the values from the users, and upon that values i am filling data in to the internal table.
Now i want to pass that internal table data to the smart form
and print that data in the smart form.
So could you pls give me some pseudo code or any steps to achieve it.
Thanks & Regards,
DS

Hi DS,
First of all you need to create a SF and then need to call the FM generated by the FM in your report.
In the SF in the form interface>tables tab>mention the name of the table and its type structure.
Pls note that a new structure has to be created as the same type of your internal table which holds the data.
And the import and export parameters as just the same as in a FM.
Now after you create and activate your SF a FM will be generated (wen u execute your SF you will be taken to this SE37 screen with the name of FM so no probs..)
You can call this FM in your report. Hope this helps.
Ex:
say itab has your final data, and you also want to export a variable var1 to the SF.
after your normal report operations end, call the FM and pass on these data.
say your FM name is FM1.
call function FM1
exporting
var1 = var1
tables
itab1 = itab1.
pls note that in the SF also i gave the same names, it is not mandatory to give the same names.
and as you want to print a table in the smartforms, you need to create a table in the smart forms and then display the data which is quite simple.
Hope this helps...
if you need any further explanations, pls revert...
Regards,
Narendra.
Reward points if helpful!!!

How to export internal table and pass the internal table to another screen?

Hi,
I have a sql SELECT statement that select data from table into internal table. I would like to export out the internal table and pass to another screen and display the data in ALV list. How to export it out? I try but the error given was " The type of "OUT_SELECT_ITAB" cannot be converted to the type of "itab_result".
Another question is, how to pass the internal table that i export out from the function module to another screen?
Here is the code
==============================================================
FUNCTION ZNEW_SELECT_ZSTUD00.
""Local Interface:
*" IMPORTING
*"     REFERENCE(IN_SELECT_YEAR) TYPE ZSTUD00-EYEAR
*" EXPORTING
*"     REFERENCE(OUT_RESULT) TYPE CHAR9
*"     REFERENCE(OUT_SELECT_ITAB) TYPE ZSTUD00
*& Global Declarations
DATA: itab TYPE ZSTUD00,
      itab_result TYPE TABLE OF ZSTUD00.
*& Processing Blocks called by the Runtime Environment
itab-eyear = IN_SELECT_YEAR.
SELECT *
FROM ZSTUD00
INTO TABLE itab_result
WHERE eyear = IN_SELECT_YEAR.
IF sy-subrc = 0.
out_result = 'Success'.
OUT_SELECT_ITAB = itab_result.
ELSE.
out_result = 'Fail'.
ENDIF.
ENDFUNCTION.
===============================================================
Please advise. Thanks
Regards,
Rayden

Hi Nagaraj,
I try to change it in Tables tab page but it state that TABLES parameters are obsolete. when i "Enter". I try to "Enter" again. it seem to be ok but it stil give me the same error.
================================================================
FUNCTION ZNEW_SELECT_ZSTUD00.
""Local Interface:
*" IMPORTING
*"     REFERENCE(IN_SELECT_YEAR) TYPE ZSTUD00-EYEAR
*" EXPORTING
*"     REFERENCE(OUT_RESULT) TYPE CHAR9
*" TABLES
*"      OUT_SELECT_ITAB STRUCTURE ZSTUD00
*& Global Declarations
DATA: itab TYPE ZSTUD00,
      itab_result TYPE TABLE OF ZSTUD00.
*& Processing Blocks called by the Runtime Environment
itab-eyear = IN_SELECT_YEAR.
SELECT *
FROM ZSTUD00
INTO TABLE itab_result
WHERE eyear = IN_SELECT_YEAR.
IF sy-subrc = 0.
out_result = 'Success'.
OUT_SELECT_ITAB = itab_result.
ELSE.
out_result = 'Fail'.
ENDIF.
ENDFUNCTION.
===============================================================
regards,
Rayden

How to pass the internal table defined in program to ALV

Hi Friends,
I have a doubt regaring the ALV's,
How can we pass the internal table defined in the program to ALV by not filling the attribute (I_STRUCTURE_NAME) in the REUSE_ALV_LIST_DISPLAY.
I have tried many ways but unable to pass the structure of the internal table. I am getting the error message "Field Catalog Not Specified......" and its terminating and when i am giving the I_STRUCTURE_NAME = 'INTERNAL-TABLE-NAME' then its displaying a blank screen with all the tool-bars and icons...(No output of internal table data is seen on the screen) .
and when i am passing the DDIC table or structure ( for eg. LFA1) to I_STRUCTURE_NAME then its displaying with any error.
Plaese help in resolving this problem....
Regards
Pradeep Goli

Hi,
Check this thread which gives example of ALV. This will give you an idea.
Interactive ALV
ashish

How to pass the internal table data to smartforms

Hi Gurus,
I have a problem in passing the internal table data to the smartforms. In the print program
I get the data into one internal table "LT_PRDLBL1". I am passing this internal table to the other in print program by calling the FM_NAME.
CALL FUNCTION fm_name
EXPORTING
ARCHIVE_INDEX =
ARCHIVE_INDEX_TAB =
ARCHIVE_PARAMETERS =
 CONTROL_PARAMETERS = T_SSFCTRLOP
MAIL_APPL_OBJ =
MAIL_RECIPIENT =
MAIL_SENDER =
 OUTPUT_OPTIONS = T_SSFCOMPOP
 USER_SETTINGS = ' '
IMPORTING
DOCUMENT_OUTPUT_INFO =
JOB_OUTPUT_INFO =
JOB_OUTPUT_OPTIONS =
TABLES
 LT_PRDLBL = LT_PRDLBL1
EXCEPTIONS
 FORMATTING_ERROR = 1
 INTERNAL_ERROR = 2
 SEND_ERROR = 3
 USER_CANCELED = 4
 OTHERS = 5
In the print program I had defined the internal tables like
Data: lt_prdlbl type standard table of zprdlbl.
Data: Begin of lt_prdlbl1 occurs 0.
 include structure zprdlbl.
Data: End of lt_prdlbl1.
How do I define the internal table in the smartform to get the values printed in the smartform?.
<REMOVED BY MODERATOR>
Thanks,
Edited by: Alvaro Tejada Galindo on Apr 21, 2008 1:01 PM

Nehal,
Thanks for quick response.
In the smartform under the Form Interface->Tables tab
I had defined
LT_PRDLBL LIKE ZPRDLBL. If I define TYPE instead of LIKE I get the error message saying "FLAT TYPES may only be referenced using LIKE for table parameters".
In the main window I have created LOOP, in which I have ticked the internal table and
LT_PRDLBL INTO LT_PRDLBL. In the text node I am passing the values of this internal table
&LT_PRDLBL-XXXX&.
I am able to get the print but the data is not printing.
Please help me with this.
Thanks,

Passing an internal table WITH HEADER LINE to abap object

Hi. In another thread, it was explained how to pass an internal table to an abap object method. Is it possible to pass an internal table that has a header line, and RETAIN the header line once the table has been passed?
My problem is, that I can pass the table, update it, but the read buffer is not populated when returning from the object's method. This is the result of being able to pass a STANDARD TABLE type, but not a STANDARD TABLE WITH HEADER LINE.
This means that I have to read the table into a work area instead of doing a READ TABLE LKNA1 within the method, which is what I need to do.
Thanks.

Please check this sample program, notice that it is modifing the internal table and passing it back modified as well as passing the "work area" or "header line" back thru the exporting parameter.
report zrich_0001.
*       CLASS lcl_app DEFINITION
class lcl_app definition.
public section.
    types: t_t001 type table of t001.
    class-data: it001 type table of t001.
    class-data: xt001 like line of it001.
    class-methods: change_table
                                exporting ex_wt001 type t001
                                changing im_t001 type t_t001.
endclass.
data: w_t001 type t001.
data: a_t001 type table of t001 with header line.
start-of-selection.
select * into table a_t001 from t001.
call method lcl_app=>change_table
             importing
                 ex_wt001 = w_t001
             changing
                 im_t001 = a_t001[] .
check sy-subrc = 0.
*       CLASS lcl_app IMPLEMENTATION
class lcl_app implementation.
method change_table.
    loop at im_t001 into xt001.
      concatenate xt001-butxt 'Changed'
           into xt001-butxt separated by space.
      modify im_t001 from xt001.
    endloop.
    ex_wt001 = xt001.
endmethod.
endclass.
Regards,
Rich Heilman

How to pass a internal table used in one method to another method in a view

hi all,
Is it possible to pass a internal table from one method to another method in a view??
If so , kindly help me.

Hi Bala,
If you want to pass this internal table between different methods of the same view then write the contents of this internal table to a context node of your view using BIND_TABLE. You can then read the contents of this internal table from the other method using the reference of that node & the GET_STATIC_ATTRIBUTES_TABLE method.
However if you want to pass the internal table between methods of different views then create a context node at the COMPONENTCONTROLLER level & then do a context mapping of this node to your local views context in both your views. You can follow the same BIND_TABLE & GET_STATIC_ATTRIBUTES_TABLE methods approach.
Regards,
Uday

How to pass a internal table into Java Bean

Hi Experts,
I created a JSPDyn page to display Sales orders form R/3 using bapi_sales_order_getlist.
I used JCO to establish connectivity between JSP Dynpage and R/3. I executed the bapi successfully, i want to move the sales orders retrieved from the Bapi to a Java Bean. So that i can use the bean to populate the value as a table.
with regards,
James.
Valuable answers will be rewarded.....

Hi Bala,
If you want to pass this internal table between different methods of the same view then write the contents of this internal table to a context node of your view using BIND_TABLE. You can then read the contents of this internal table from the other method using the reference of that node & the GET_STATIC_ATTRIBUTES_TABLE method.
However if you want to pass the internal table between methods of different views then create a context node at the COMPONENTCONTROLLER level & then do a context mapping of this node to your local views context in both your views. You can follow the same BIND_TABLE & GET_STATIC_ATTRIBUTES_TABLE methods approach.
Regards,
Uday

Error Passing an internal table between BSP pages

Any time there is data in the internal table and I try to pass it from one BSP page to the next I get an Web error. I've heard that it is possible to pass an internal table from one page to the next. can anyone point me in the right direction here?

You can do this with the navigation object only if the table is very small. Overwise it overflows 2+KB limitation of URLs.
Alternative ideas is to use server side cookies (search forum for many examples).
If stateful, just hang stuff of your application class.

How to pass an internal table to a SmartForm?

Hi there!
I have a program that calls a SmartForm.
I have a internal table wich I want to print.
This internal table is based on a custom structure with NO standard includes (e.g., with custom fields).
How do I declare this internal table in the transaction SMARTFORMS?
Best Regards,
Luís.

Refer below thread..
How to pass an internal table to smartform.
hope it will solve ur problem
Thanks & Regards
ilesh 24x7

Problem reading data from nested internal table.

Hi,
Below is my code;
*********SAP Code********
TYPES: BEGIN OF v54a0_scdd,
 fknum LIKE vfkk-fknum,
 change LIKE vfkkd-updkz,
 x TYPE v54a0_scd,
 y TYPE v54a0_scd,
 tvtf LIKE tvtf,
 END OF v54a0_scdd.
SCD table for dialog
TYPES: v54a0_scdd_tab TYPE v54a0_scdd OCCURS 1.
*********SAP Code********
*Custom declaration*****
data: wa_freight_costs type v54a0_scdd_tab.
data: it_freight_costs type v54a0_scdd_tab occurs 0.
*****Here data is getting appended to it_freight_costs. P_frieght_costs is coming from standard program.
 move p_freight_costs TO wa_FREIGHT_COSTS.
 append wa_freight_costs to it_freight_costs.
 clear wa_freight_costs.
***Now the problem is here. I am not able to read the data from the nested internal table x-item.
if i use <fs_f_costs> to move data from it_freight_costs in the outer loop, i get a syntax error; "the line type of the table it_freight_costs is not compatible with field symbol type <fs_f_costs>" 
 FIELD-SYMBOLS: <fs_f_costs> type line of v54a0_scdd_tab.
 LOOP AT it_freight_costs assigning <fs_f_costs>.
 LOOP AT <fs_f_costs>-x-item ASSIGNING <fs_freight_item>.
 I want to read <fs_freight_item>-vfkp-netwr.
 ENDLOOP.
Can anyone guide me?

A quick look at how I would do this. Note I haven't checked if this compiles just done a quick brain-dump.
DATA: lr_f_costs TYPE REF TO v54a0_scdd_tab,
 lr_f_cost TYPE REF TO v54a0_scdd.
LOOP AT it_freight_costs REFERENCE INTO lr_f_costs.
 LOOP AT lr_f_costs->* REFERENCE INTO lr_f_cost.
 ENDLOOP.
ENDLOOP.
As you can see I personally prefer pointers to field symbols - I don't believe there is any performance differences and because of my background in other languages pointers make more sense to me.
Cheers
Graham Robbo

Passing Nested internal table to GUI_DOWNLOAD

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