i think you miss the create document.
* Creating Document
l_document = cl_document_bcs=>create_document(
i_type = 'RAW'
i_text = i_content[]
i_subject = 'Material Details' ).
i think you miss the create document.
* Creating Document
l_document = cl_document_bcs=>create_document(
i_type = 'RAW'
i_text = i_content[]
i_subject = 'Material Details' ).