我用STEP7打开OB1程序块，怎么提示NO valid license key found,please install a valid license key!
one or more obects of type(146072)can't be represnted,make sure the required software packages are installed ,NO changes can be made in this station!听说要装了什么授权，我没有装，我想问一下这个授权的文件在STEP7里面叫什么文件名字？？？
