아래의 소스에서 바로 캐치문으로 빠지는데 이유가 뭔가요???

고수님 답변 간절히 기다립니다.

 

TRY.
        amf ?= ch_message.  <== 여기에서 바로 catch문으로 빠져요 ㅠㅠ
        IF l_msgclass = if_xms_msghdr30_main=>co_msgclass_appack OR l_msgclass = if_xms_msghdr30_main=>co_msgclass_sysack.
          lv_pl_id = 'CENTRAL_BACK'.
        ELSE.
          lv_pl_id = 'CENTRAL'.
        ENDIF.
        ro->set_external_pl_id( lv_pl_id ).
        IF space = ch_message->get_message_format( )
           OR if_xms_message_xmb=>co_payload_message = ch_message->get_message_format( ).
          RAISE EXCEPTION TYPE cx_sy_move_cast_error.
        ENDIF.
        TRY.
            CASE im_adapter_id.
              WHEN if_xms_engine=>co_adapter_process_engine.
                CREATE OBJECT enter_xms type cl_xms_amf_inb_persist_bpe
                  EXPORTING
                    mmf         = amf
                    pid         = lv_pl_id
                    msg_class   = l_msgclass
                    adp_context = im_adapter_context.
                enter_xms->persist_amf( ).
            ENDCASE.
          CATCH cx_xms_system_error.
        ENDTRY.
      CATCH cx_sy_move_cast_error.
        enter_xms( EXPORTING im_url        = lv_url
                             im_auth_check = im_auth_check
                   CHANGING ch_message = ch_message ).
    ENDTRY.