Hi,
I change the code to work with "string_to_soli"
* DATA: it_solix TYPE solix_tab .
*
* CALL METHOD cl_bcs_convert=>string_to_solix
* EXPORTING
* iv_string = message_text
* IMPORTING
* et_solix = it_solix.
DATA: it_soli TYPE soli_tab .
CALL METHOD cl_bcs_convert=>string_to_soli
EXPORTING
iv_string = message_text
RECEIVING
et_soli = it_soli.
CALL METHOD cl_document_bcs=>create_document
EXPORTING
i_type = 'HTM'
i_subject = p_sbjct
i_text = it_soli
* i_hex = it_solix
RECEIVING
result = ob_document_bcs.
It is working also.
Regards.