Wrong Coordinates using run_cmp.py

[reallyneedhel-p]

I have used the file from directory of ~/examples/visual_nav_cmp

When I run the file with the command of --goal_x =2.0m --goal_y=0.0m and --goal_t=0rad, the locobot moves to its desired location. However, problem starts when I run the command of --goal_x=-2.0m --goal_y=0.0m and --goal_t=0rad, as the robot does not return to its starting location, missing the exact location by probably 0.2m in terms of x aixs and y axis respectively. Could you perhaps please check if there needs to be a change in algorithm for the file of run_cmp.py used? Or any idea on how to improve on?

I would kindly appreciate it. Thank you.