download an ALV report into an excel sheet
CALL FUNCTION 'SAP_CONVERT_TO_XLS_FORMAT'
EXPORTING
i_field_seperator = 'X'
* I_LINE_HEADER =
i_filename = p_pcfile
* I_APPL_KEEP = 'X'
TABLES
i_tab_sap_data = it_excel
* CHANGING
* I_TAB_CONVERTED_DATA =
EXCEPTIONS
conversion_failed = 1
OTHERS = 2