Expression ‘X’ is already defined in file ”, at or just before line ’43’.

Expression 'X' is already defined in file '', at or just before line '43'.Trying to redefine it in file `<ADS netlist>', at or just before '47'.Please change the redefinition policy using 'Options' component if it is needed.

ads仿真，添加变量后提示这个。
原因，变量中定义的参数，在多个变量中存在重复定义。修改即可。