昨天还好使,今天就不进不去了,双击step75.3提示如下:
automation license management
cannot establish connection to the automation license management service 按确定后提示
SIMATIC Manager
No valid license Key found.please install a valid license Key
备注:automation license management
也进不去,但Wincc能打开,别的其他软件也没安装(没有冲突)