Error while executing exploration_mode

[dac31415]

Hello, I am having this issue with pepper while trying to explore. I have found this even with the example provided in the documentation. Also, while the radius is a small value like 0.5 or 1, even 2 sometimes it works and finishes the mapping. However, when I try with bigger values the following error appears. Thank you in advance.

Traceback (most recent call last):
  File "demo_wrapper.py", line 9, in <module>
    pepper.exploration_mode(3)
  File "/home/danalcruz/pepper_mich/pepper_robot/robot.py", line 284, in exploration_mode
    self.navigation_service.explore(radius)
RuntimeError: Session closed