Hi Grant,
Thanks for your response. My problem was resolved.
Now, I want to ask another question. Currently I am getting the gaze data using the callback function but I can not pass the value to another function. I want to make a lsit and save the gaze data I am getting from the eye tracker. For that, I need to pass the values outside the callback function but I am not being able to acheive it. Can you help in that?