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Common Issues

Gazebo Issues

1. PID reading error
[ERROR] [1617369469.665635903, 0.160000000]: No p gain specified for pid.  Namespace: /jetbot_0/gazebo_ros_control/pid_gains/lt_wheel_joint
[ERROR] [1617369469.666604764, 0.160000000]: No p gain specified for pid.  Namespace: /jetbot_0/gazebo_ros_control/pid_gains/rt_wheel_joint

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2. Jetbot not moving in Gazebo during the training

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Training Issues

1. Training failed after change the parameter
2021-04-02 13:58:20.484572: I tensorflow/core/platform/profile_utils/cpu_utils.cc:112] CPU Frequency: 2900010000 Hz
/usr/local/lib/python3.8/dist-packages/numpy/core/fromnumeric.py:3372: RuntimeWarning: Mean of empty slice.
  return _methods._mean(a, axis=axis, dtype=dtype,
/usr/local/lib/python3.8/dist-packages/numpy/core/_methods.py:170: RuntimeWarning: invalid value encountered in double_scalars
  ret = ret.dtype.type(ret / rcount)

Solution:

  1. Close Gazebo and other rqt windows
  2. Delete saved_model

Server Issues

1. Gazebo come up with a problem while rqt runs fine.
libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast

[wait for solution]