Hi Kurt,
why you are not using FM 'TEXT_CONVERT_XLS_TO_SAP'. It will be quite faster and no need to provide column and row parameters as well.
TYPE-POOLS truxs.
DATA : lt_tab_raw_data TYPE truxs_t_text_data.
*Get data of Excel File into Internal table.
CALL FUNCTION 'TEXT_CONVERT_XLS_TO_SAP'
EXPORTING
i_field_seperator = 'X'
i_line_header = 'X'
i_tab_raw_data = lt_tab_raw_data
i_filename = p_file "file name with path
TABLES
i_tab_converted_data = <fs_dyntable> "Target table
EXCEPTIONS
conversion_failed = 1
OTHERS = 2.