See the sample BDC program for CODE ZGROUPS 

REPORT zpm_code_group_upload
NO STANDARD PAGE HEADING LINE-SIZE 255.

* Standard Include for Selection Screen
INCLUDE bdcrecx1.

* Internal Table for Upload Data
DATA: BEGIN OF i_codegroup OCCURS 0,
katalogart(001), " Catalog
codegruppe(008), " Code Group
kurztext(040), " Description
* status(001), " Status
END OF i_codegroup.

* Parameters
PARAMETERS: p_file LIKE ibipparms-path. " Filename

* At selection-screen on Value Request for file Name
AT SELECTION-SCREEN ON VALUE-REQUEST FOR p_file.

* Get the F4 Values for the File
CALL FUNCTION 'F4_FILENAME'
EXPORTING
program_name = syst-cprog
dynpro_number = syst-dynnr
IMPORTING
file_name = p_file.

* Start of Selection
START-OF-SELECTION.

* Open the BDC Session
PERFORM open_group.

* Upload the File into internal Table
CALL FUNCTION 'UPLOAD'
EXPORTING
filename = p_file
filetype = 'DAT'
TABLES
data_tab = i_codegroup
EXCEPTIONS
conversion_error = 1
invalid_table_width = 2
invalid_type = 3
no_batch = 4
unknown_error = 5
gui_refuse_filetransfer = 6
OTHERS = 7.

IF sy-subrc 0.
* MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
* WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.

sort i_codegroup by katalogart.
* Upload the Data from Internal Table
LOOP AT i_codegroup.
* Initial Screen
PERFORM bdc_dynpro USING 'SAPLQSBA' '0010'.
PERFORM bdc_field USING 'BDC_OKCODE'
'/EAEND'.
PERFORM bdc_field USING 'BDC_CURSOR'
'RQSBA-CODEGRUPPE'.
PERFORM bdc_field USING 'RQSBA-KATALOGART'
i_codegroup-katalogart.
PERFORM bdc_field USING 'RQSBA-CODEGRUPPE'
i_codegroup-codegruppe.
* Second Screen
PERFORM bdc_dynpro USING 'SAPLQSBA' '0100'.
PERFORM bdc_field USING 'BDC_CURSOR'
'V_QPGR_KAT-STATUS(01)'.
PERFORM bdc_field USING 'BDC_OKCODE'
'=SAVE'.
PERFORM bdc_field USING 'V_QPGR_KAT-KURZTEXT(01)'
i_codegroup-kurztext.
PERFORM bdc_field USING 'V_QPGR_KAT-STATUS(01)'
'2'. "i_codegroup-status.
* Call the Transaction
PERFORM bdc_transaction USING 'QS41'.

ENDLOOP.

* Close the BDC Session
PERFORM close_group.

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