用STARTING NEW TASK 方式调用函数ABAP4_CALL_TRANSACTION，会打开一个新的窗口(session)运行tcode。
函数ABAP4_CALL_TRANSACTION本质上是封装了CALL TRANSACTION
代码：
REPORT ztest_open_tcode. CALL FUNCTION 'ABAP4_CALL_TRANSACTION' STARTING NEW TASK 'NEW_SESSION' EXPORTING tcode = 'SE38' * SKIP_SCREEN = ' ' * MODE_VAL = 'A' * UPDATE_VAL = 'A' * IMPORTING * SUBRC = * TABLES * USING_TAB = * SPAGPA_TAB = * MESS_TAB = EXCEPTIONS call_transaction_denied = 1 tcode_invalid = 2 OTHERS = 3. IF sy-subrc <> 0. * Implement suitable error handling here ENDIF.
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