I did this with a flat file .csv from our IFS. These are the FMs you would need. You will have to do some research(not an easy task in SAP) but betting an XML file is possible too. CALL METHOD cl_gui_frontend_services=>file_open_dialog * EXPORTING * WINDOW_TITLE = * DEFAULT_EXTENSION = * DEFAULT_FILENAME = * FILE_FILTER = * INITIAL_DIRECTORY = * MULTISELECTION = CHANGING file_table = file_table rc = rc * USER_ACTION = * EXCEPTIONS * FILE_OPEN_DIALOG_FAILED = 1 * CNTL_ERROR = 2 * ERROR_NO_GUI = 3 * NOT_SUPPORTED_BY_GUI = 4 * others = 5 . LOOP AT file_table INTO sfilename. ENDLOOP. IF sy-subrc <> 0. EXIT. ENDIF. CALL METHOD cl_gui_frontend_services=>gui_upload EXPORTING filename = sfilename * FILETYPE = 'ASC' * HAS_FIELD_SEPARATOR = SPACE * HEADER_LENGTH = 0 * READ_BY_LINE = 'X' * IMPORTING * FILELENGTH = * HEADER = CHANGING data_tab = input EXCEPTIONS file_open_error = 1 file_read_error = 2 no_batch = 3 gui_refuse_filetransfer = 4 invalid_type = 5 no_authority = 6 unknown_error = 7 bad_data_format = 8 header_not_allowed = 9 separator_not_allowed = 10 header_too_long = 11 unknown_dp_error = 12 access_denied = 13 dp_out_of_memory = 14 disk_full = 15 dp_timeout = 16 not_supported_by_gui = 17 error_no_gui = 18 OTHERS = 19

I did this with a flat file .csv from our IFS. These are the FMs you would need. You will have to do some research(not an easy task in SAP) but betting an XML file is possible too. CALL METHOD cl_gui_frontend_services=>file_open_dialog * EXPORTING * WINDOW_TITLE = * DEFAULT_EXTENSION = * DEFAULT_FILENAME = * FILE_FILTER = * INITIAL_DIRECTORY = * MULTISELECTION = CHANGING file_table = file_table rc = rc * USER_ACTION = * EXCEPTIONS * FILE_OPEN_DIALOG_FAILED = 1 * CNTL_ERROR = 2 * ERROR_NO_GUI = 3 * NOT_SUPPORTED_BY_GUI = 4 * others = 5 . LOOP AT file_table INTO sfilename. ENDLOOP. IF sy-subrc <> 0. EXIT. ENDIF. CALL METHOD cl_gui_frontend_services=>gui_upload EXPORTING filename = sfilename * FILETYPE = 'ASC' * HAS_FIELD_SEPARATOR = SPACE * HEADER_LENGTH = 0 * READ_BY_LINE = 'X' * IMPORTING * FILELENGTH = * HEADER = CHANGING data_tab = input EXCEPTIONS file_open_error = 1 file_read_error = 2 no_batch = 3 gui_refuse_filetransfer = 4 invalid_type = 5 no_authority = 6 unknown_error = 7 bad_data_format = 8 header_not_allowed = 9 separator_not_allowed = 10 header_too_long = 11 unknown_dp_error = 12 access_denied = 13 dp_out_of_memory = 14 disk_full = 15 dp_timeout = 16 not_supported_by_gui = 17 error_no_gui = 18 OTHERS = 19