Hi,
Try:
DATA: big_string TYPE xstring .
DATA: mess TYPE string .
OPEN DATASET p_path FOR INPUT IN BINARY MODE MESSAGE mess .
READ DATASET p_path INTO big_string .
CLOSE DATASET p_path .
DATA: it_solix TYPE solix_tab .
CALL METHOD cl_bcs_convert=>xstring_to_solix
EXPORTING
iv_xstring = big_string
RECEIVING
et_solix = it_solix.
Regards.