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Version: 6

Troubleshooting Guide

Installation Troubleshooting​

ModuleNotFoundError during installation​

Problem: When I attempt to install MoveIt Pro on Ubuntu 22.04, I see error messages in my terminal such as:

ModuleNotFoundError: No module named 'X'

For example,

ModuleNotFoundError: No module named 'typer'

Solution: Make sure you are not using a Python virtual environment (which is missing expected dependencies). Use deactivate for venv/virtualenv environments and conda deactivate for Conda environments.

build Troubleshooting​

Docker on ZFS​

Problem: When I attempt to build my user_image or user_workspace on a system using ZFS, I see error messages in my terminal suggesting that I am running out of disk space, even though I am not.

Solution: Perform the following steps to update the docker daemon to use the ZFS storage driver:

  • Stop docker: sudo system stop docker

  • Backup the docker data: sudo cp -au /var/lib/docker /var/lib/docker.bk

  • Clear out the docker data: sudo rm -rf /var/lib/docker/*

  • Find available zpools: sudo zfs list which gives bpool and rpool on my system. If you have no existing pools jump to the next step. The pool rpool has most of the disk space, so we will add a dataset to this pool.

    Adding to an existing zpool (rpool):

  • sudo zfs create rpool/docker

  • sudo zfs set mountpoint=/var/lib/docker rpool/docker

    Adding a new zpool (Skip this if you already added to an existing zpool):

  • sudo zfs create create -f zpool-docker -m /var/lib/docker /dev/xvdf /dev/xvdg (replace the /dev/ devices appropriately).

    (Optional) Restoring backed up docker data:

  • sudo cp -a /var/lib/docker.bk /var/lib/docker

    Restart docker:

  • sudo system restart docker

Temporary failure resolving Apt repositories​

Problem: When I attempt to build my user_image, I see error messages in the terminal such as:

# Ign:1 http://ports.ubuntu.com/ubuntu-ports jammy InRelease
 => => # Ign:3 http://ports.ubuntu.com/ubuntu-ports jammy-updates InRelease
 => => # Ign:4 http://ports.ubuntu.com/ubuntu-ports jammy-backports InRelease
 => => # Ign:5 http://ports.ubuntu.com/ubuntu-ports jammy-security InRelease
 => => # Err:1 http://ports.ubuntu.com/ubuntu-ports jammy InRelease
 => => #   Temporary failure resolving 'ports.ubuntu.com'
failed to receive status: rpc error: code = Unavailable desc = error reading from server: EOF

Solution: If you are using a virtual machine (VM), e.g. through VMWare or Parallels, this can sometimes happen when the VM has been suspended for a long time. Try rebooting the VM and verify whether the issue persists.

Debian dependency problems​

Problem: As a Debian user migrating to MoveIt Pro 5.0.0, when I attempt to build my user_image, I see error messages in my terminal such as:

The following packages have unmet dependencies:
    moveit-pro : Depends : python3-ruamel.yaml (>= 0.17.16) but 0.16.12-2 is to be installed
                 Depends : python3-typer (>= 0.4.0-1) but 0.4.0-1~bpo11+1 is to be installed
E: Unable to correct problems, you have held broken packages.

Solution: Enable bulleseye-backports:

echo "deb http://deb.debian.org/debian bullseye-backports main contrib non-free" | sudo tee -a /etc/apt/sources.list

For more information on migrating to MoveIt Pro 5.0.0: Migration guide

run Troubleshooting​

Unable to open display​

Problem: When attempting to run MoveIt Pro with a Gazebo simulation, I see error messages in my logs involving Unable to open display:.

Solution: Gazebo requires access to your display server to correctly visualize simulated scenes. Two common issues that could prevent the environment from accessing your display are:

Running MoveIt Pro from a CLI environment that does not have access to an X server, such as over an ssh connection.

The simplest solution to starting a Gazebo simulation is to launch it from a graphical desktop environment. However, if ssh is a requirement, ensure that the session has X forwarding enabled. Though there may be other issues with hardware acceleration depending on your machine setup.

Running as a non-UID 1000 user without permission to the X server in the graphical desktop.

By default, the MoveIt Pro application runs as a user with UID 1000. If this does not match your user's UID, then you will need to explicitly give xhost permissions to the application. At each login to your host machine, run the following to ensure the application has permissions to access display resources:

xhost +local:docker

DDS UDP communication errors​

Problem: When I attempt to run MoveIt Pro, I see error messages in my logs from MoveIt Pro and other ROS processes involving ddsi_udp_conn_write_failed.

Solution: Try restarting the ROS daemon with ros2 daemon stop, then ros2 daemon start. If that doesn't work, try rebooting.

MoveIt Studio fails to bind ports​

Problem: When I attempt to run MoveIt Pro and MoveIt Studio (the web UI), I see error messages in my logs from the web_ui container such as:

moveit_studio-web_ui-1        | 2023/09/26 16:23:26 [emerg] 1#1: bind() to 0.0.0.0:80 failed (98: Address already in use)
moveit_studio-web_ui-1        | nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)

Solution: Check for other processes using localhost port 80 and kill them:

lsof -i tcp:80
kill $(lsof -t -i:80)

MoveIt Studio does not finish loading​

Problem: When I attempt to run MoveIt Pro and MoveIt Studio (the web UI), MoveIt Studio does not finish loading. The robot or other objects are not displayed.

Solution: A previous process likely did not shut down properly. Close the terminals that were previously running MoveIt Pro with Ctrl+D. Then open new terminals and launch again.

Using MoveIt Pro and MoveIt Studio​

Unclear reason for failure of PlanMTCTask motion planning behavior​

Problem: My PlanMTCTask behavior fails with error code PLANNING_FAILED.

Solution: Activate MoveIt Studio's solution instrospector by clicking the bug icon on the PlanMTCTask node in the behavior tree to inspect each stage's solutions/lack of solutions and better understand the nature of the failure. If you are already familiar with the Rviz Motion Planning Tasks plugin you can also use it by launching the Developer RViz configuration:

moveit_pro rviz

Unclear planning scene state​

Problem: I am unclear about the the current state of the planning scene.

Solution: Launch the Developer RViz configuration and use the Planning Scene widget view the scene robot and geometry used by MoveIt:

moveit_pro rviz

Robot is stuck in collision​

Problem: The robot arm got into collision during jogging-based teleoperation and the robot cannot be moved.

Solution: To resolve the collision, use MoveIt Pro's Jog Collision Checking to carefully disable collision checking and jog the arm out of the collision. If the collision occurred during jogging-based teleoperation and collided with an object modeled in the planning scene, this can occur if the rate of arm movement is greater than the rate of collision checking. To increase the rate of collision checking, the following parameters can be tweaked in the MoveIt Servo YAML configuration file in your robot configuration package:

collision_check_rate: 10.0  # [Hz] Collision-checking can easily bog down a CPU if done too often.

You must restart MoveIt Pro for these changes to take effect.

Missing Info messages in MoveIt Studio​

Problem: When using MoveIt Studio, I am not seeing logged messages published at the Info level appear as a "Toast" message in the top right corner of MoveIt Studio:

I have a line in my custom behavior shared_resources_->logger->publishInfoMessage(...); that I expect to run but I don't see the logged message coming through in the UI.

Solution: Change the log level output in the UI by pressing the log level bell icon in the top right corner of the UI and checking the info level box.

Log level bell

Log level checkboxes

Joint values cannot be copied from joint jog panel​

Problem: When I attempt to copy joint values from the joint jog panel in MoveIt Studio, I see the following message in MoveIt Studio:

Text cannot be copied over an insecure (non-HTTPS) connection.

Solution: If possible, access MoveIt Studio in your browser via localhost and not an IP address.

Networking and PC Setup​

Multiple computer setup cannot communicate via DDS​

Problem: In a multiple computer setup, I can ping the other computer but can't communicate with it via ros2 run demo_nodes_py talker + ros2 run demo_nodes_py listener

Solution: Check that your network interface adapter and peer address entries for your method of configuring DDS are correct as explained in the DDS configuration docs.

Multiple computer setup error messages that "Action server not available"​

Problem: Multiple computers are connected over the network, but the agent cannot seem to access action servers or services provided by the robot drivers, or discover controllers, resulting in errors such as:

[ERROR] [1658269925.062171689] [MoveGripperAction]: Error code: -25; Message: Failed to send trajectory execution action goal to server.; Details: Action server not available.
...
[ERROR] [1658269931.800549146] [Teleoperate]: Error code: 99999; Message: Failed to enable required controller servo_controller; Details: Service /ensure_controller_is_active failed with message: Failed to ensure that specified controllers are active.
...
[ERROR] [1658269939.054476603] [moveit_ros.trajectory_execution_manager]: Controller '/joint_trajectory_controller' is not known

Solution: Check that your network interface adapter and peer address entries for your method of configuring DDS are correct as explained in the DDS configuration docs.

Multiple computer setup does not have synchronized clocks​

Problem: When using multiple computer setups, the computers' clocks go out of sync. This can been seen by messages arriving from the future. Or TF complaining about old messages.

Solution: To solve this, one or both of the machines should install chrony:

sudo apt-get install chrony

If any machine in the setup does not have access to NTP, the machine that has chrony installed can serve as a NTP server. Suppose the drivers RTPC does not have an internet connection, but has a direct link to the agent PC. On the main PC (usually the PC running the Agent), install chrony and then add lines to /etc/chrony/chrony.conf to allow the drivers RTPC to connect to it. For example:

# Allow drivers PC to use the agent PC as NTP server
allow 192.168.1.2  # This should be the IP address of drivers RTPC

Then restart the service:

sudo systemctl restart chrony.service

On the drivers RTPC, reconfigure timesyncd to use the agent PC as an NTP server. Modify /etc/systemd/timesyncd.conf to have:

[Time]
# Use the Agent PC as the primary NTP source
NTP=192.168.1.1  # This should be the IP address of the agent PC

And restart the service:

systemctl restart systemd-timesyncd.service

For more information on more complex installations: Setup guide

Robot Hardware and Cameras​

Cannot connect to RealSense camera​

Problem: I cannot connect to my Realsense camera.

Solution: Reconnect the Realsense and then check if you can view it in the realsense program: if the program is not on your system, follow the Realsense Drivers instructions. The expected set of realsense packages should look something like this:

$ apt list --installed | grep realsense

librealsense2-dbg/focal,now 2.48.0-0~realsense0.4976 amd64 [installed]
librealsense2-dev/focal,now 2.48.0-0~realsense0.4976 amd64 [installed]
librealsense2-dkms/focal,now 1.3.18-0ubuntu1 all [installed]
librealsense2-gl-dbg/focal 2.48.0-0~realsense0.4976 amd64
librealsense2-gl-dev/focal 2.48.0-0~realsense0.4976 amd64
librealsense2-gl/focal,now 2.48.0-0~realsense0.4976 amd64 [installed,automatic]
librealsense2-net-dbg/focal 2.48.0-0~realsense0.4976 amd64
librealsense2-net-dev/focal 2.48.0-0~realsense0.4976 amd64
librealsense2-net/focal,now 2.48.0-0~realsense0.4976 amd64 [installed,automatic]
librealsense2-udev-rules/focal,now 2.48.0-0~realsense0.4976 amd64 [installed,automatic]
librealsense2-utils/focal,now 2.48.0-0~realsense0.4976 amd64 [installed]
librealsense2/focal,now 2.48.0-0~realsense0.4976 amd64 [installed,automatic]
ros-humble-librealsense2-dbgsym/focal 2.48.0-1focal.20210701.133935 amd64
ros-humble-librealsense2/focal,now 2.48.0-1focal.20210701.133935 amd64 [installed]
ros-humble-realsense-msgs-dbgsym/focal 2.0.8-2focal.20210630.230828 amd64
ros-humble-realsense-msgs/focal 2.0.8-2focal.20210630.230828 amd64
ros-humble-realsense2-camera-dbgsym/focal 3.2.2-1focal.20210705.140737 amd64
ros-humble-realsense2-camera-msgs-dbgsym/focal 3.2.2-1focal.20210705.135802 amd64
ros-humble-realsense2-camera-msgs/focal 3.2.2-1focal.20210705.135802 amd64
ros-humble-realsense2-camera/focal 3.2.2-1focal.20210705.140737 amd64
ros-humble-realsense2-description/focal 3.2.2-1focal.20210705.140354 amd64

Cannot launch RealSense after performing driver update​

Problem: Can't use 2 Realsense video feeds after required driver update.

Solution: Use realsense_ros - v3.2.2, librealsense2 - v2.49.00. To downgrade these packages run install_librealsense.sh in moveit_studio/bin and rebuild your workspace.

RealSense node messages that "reduced performance is expected"​

Problem: One of the cameras does not come up properly when MoveIt Pro is launched:

[realsense2_camera_node-15] [RealSenseCameraNode]: Device 123456789012 is connected using a 2.1 port. Reduced performance is expected.

Solution: 1. Verify that the cable and USB port are both rated USB 3. 2. Unplug the cable from the camera and the computer and plug it back in. 3. Open the realsense-viewer and perform a hardware reset by clicking “More” and selecting “Hardware Reset”. 4. Try connecting a different cable.

MoveIt Pro simulator's camera feeds have low framerate​

Problem: I have an Nvidia GPU and MoveIt Pro's arm_on_rail_sim robot config's camera feeds are running at less than 10 FPS.

Solution: You will need to update your user workspace's Dockerfile to install Nvidia drivers inside the container. Refer to the instructions in the linked Dockerfile.