Storing data in a single varaible using coutvector in omnet++

Question

I am recording the data in omnet++ using the coutVector method the problem I am facing is instead of every time it stores the value in the variable it basically creates a new variable of the same name and stores the data value into it at that instance. my question how to store all the data values in a single variable? At the end of the simulation, I have data in the .vec file but it is 100 variables of the same name and each contains each instance of data in time, I want to make one variable contain all the data. in header file I define,

protected:
    cOutVector variable;

in .cc file

variable.setName("Reward");
variable.record(new_var);

That is of my code look like, One thing to clear is that This .cc file will run in each instance of simulation time. Here is the screeshot