Restart flow

Hello All,

Could you help me!

I try to call FM SAP_WAPI_ADM_WORKFLOW_RESTART  twice in one session for one ID.

First time FM return error. In this session i fix all errors. But second time FM return Error too.

In new session FM doen't return error.

      LOOP AT lt_rows INTO ls_rows.
        READ TABLE <ft_data> ASSIGNING <fs_data> INDEX ls_rows-index.
        IF sy-subrc EQ 0.
          ASSIGN COMPONENT 'WI_ID' OF STRUCTURE <fs_data> TO <fs_id>.
          CALL FUNCTION 'SAP_WAPI_ADM_WORKFLOW_RESTART'
            EXPORTING
              workitem_id   = <fs_id>    
              do_commit     = 'X'
            TABLES
              message_lines = lt_return.
        ENDIF.
      ENDLOOP.

How can i make error does not occur in same session?