SM04结束用户会话失败，删除SM12锁定清单
因用户非法退出导致锁定了事务，通过SM04踢不出去。
使用SM12列表被用户锁定的清单并删除，即可解决。
国外的贴子：
Ask: some collegue’s was locked in sap . I used SM04 to kick his session out, but failed, are there any other ways?
Reply: Goto tcode SM12.
select LIST option in application toolbar.
and then delete the required one.
