# Mastering Gazebo Simulator **URL:** https://get-help.theconstruct.ai/c/course-support/mastergazebosim/83.md [Latest](https://get-help.theconstruct.ai/latest.md) · [Categories](https://get-help.theconstruct.ai/categories.md) · [Tags](https://get-help.theconstruct.ai/tags.md) --- ## [About the Mastering Gazebo Simulator category](https://get-help.theconstruct.ai/t/about-the-mastering-gazebo-simulator-category/18283)
**Author:** [@system](https://get-help.theconstruct.ai/u/system)\ **Replies:** 0
--- ## [Mastering Gazebo Sim course is for gazebo classic!](https://get-help.theconstruct.ai/t/mastering-gazebo-sim-course-is-for-gazebo-classic/32097)
**Author:** [@kyrlosfekry](https://get-help.theconstruct.ai/u/kyrlosfekry)\ **Replies:** 1\ **Last updated:** [September 3, 2024, 12:08pm UTC](https://get-help.theconstruct.ai/t/mastering-gazebo-sim-course-is-for-gazebo-classic/32097 "2024-09-03T12:08:52Z")
why Mastering Gazebo Sim course is for Gazebo Classic is it an issue with the name or the content of the course ? --- ## [\[Bug\] gazebo and rwiz dont connect](https://get-help.theconstruct.ai/t/bug-gazebo-and-rwiz-dont-connect/30250)
**Author:** [@serkanyildirim](https://get-help.theconstruct.ai/u/serkanyildirim)\ **Replies:** 1\ **Last updated:** [April 29, 2024, 7:41am UTC](https://get-help.theconstruct.ai/t/bug-gazebo-and-rwiz-dont-connect/30250 "2024-04-29T07:41:35Z")
This is an error report. Screenshot of the error Error details gazebo and rwiz dont connect. i cant resolve --- ## [Gazebo sim bridge not working properly](https://get-help.theconstruct.ai/t/gazebo-sim-bridge-not-working-properly/29237)
**Author:** [@sakarrobotics](https://get-help.theconstruct.ai/u/sakarrobotics)\ **Replies:** 0\ **Last updated:** [March 5, 2024, 6:19am UTC](https://get-help.theconstruct.ai/t/gazebo-sim-bridge-not-working-properly/29237 "2024-03-05T06:19:20Z")
i have followed the gazebo sim course and now want to add camera to my robot and have done that successfully but after using the bridge there are no messages generated on the topic Following is the camera link and joint… --- ## [Gazebo topics not visible in rqt\_graph](https://get-help.theconstruct.ai/t/gazebo-topics-not-visible-in-rqt-graph/27969)
**Author:** [@muhammadjunaid](https://get-help.theconstruct.ai/u/muhammadjunaid)\ **Replies:** 2\ **Last updated:** [December 22, 2023, 9:26am UTC](https://get-help.theconstruct.ai/t/gazebo-topics-not-visible-in-rqt-graph/27969 "2023-12-22T09:26:57Z")
Hi ! I am getting an issue whenever i load the gazebo rqt\_graph , I can only see this : while it is supposed to look something like this : Can anyone please guide me what should I do in this case ? Best regards… --- ## [Unit 2 : build a robot : No transform from \[link\_left\_wheel\] to \[link\_chassis\]](https://get-help.theconstruct.ai/t/unit-2-build-a-robot-no-transform-from-link-left-wheel-to-link-chassis/27735)
**Author:** [@muhammadjunaid](https://get-help.theconstruct.ai/u/muhammadjunaid)\ **Replies:** 5\ **Last updated:** [December 14, 2023, 2:30pm UTC](https://get-help.theconstruct.ai/t/unit-2-build-a-robot-no-transform-from-link-left-wheel-to-link-chassis/27735 "2023-12-14T14:30:22Z")
Hi ! I am on unit 2. I have followed the instruction provided by construct to create the following URDF file. But when i open in RVIZ , it gives an error “No transform from \[link\_left\_wheel\] to \[link\_chassis\]” (screens… --- ## [Cannot see gazebo in env variables](https://get-help.theconstruct.ai/t/cannot-see-gazebo-in-env-variables/27716)
**Author:** [@muhammadjunaid](https://get-help.theconstruct.ai/u/muhammadjunaid)\ **Replies:** 4\ **Last updated:** [December 8, 2023, 9:26am UTC](https://get-help.theconstruct.ai/t/cannot-see-gazebo-in-env-variables/27716 "2023-12-08T09:26:39Z")
Hi ! I ran Turtlebot3 gazebo on my local machine but the issue is that when I run :slight\_smile: env | grep GAZEBO I cannot see anything on the terminal . But the course says I must see localhost as hostname. Can … --- ## [Unit 2, the RobotModel is not loaded](https://get-help.theconstruct.ai/t/unit-2-the-robotmodel-is-not-loaded/26153)
**Author:** [@falachl](https://get-help.theconstruct.ai/u/falachl)\ **Replies:** 4\ **Last updated:** [September 15, 2023, 7:56am UTC](https://get-help.theconstruct.ai/t/unit-2-the-robotmodel-is-not-loaded/26153 "2023-09-15T07:56:18Z")
In Unit 2 the RobotModel is not loaded and not found in when searching the add buton. Additional when starting the launch file I get the following erroer \[ WARN\] \[1693983715.118299266\]: The root link link\_chassis has an… --- ## [Can't find empty\_world.launch in Unit 3](https://get-help.theconstruct.ai/t/cant-find-empty-world-launch-in-unit-3/26205)
**Author:** [@yury.kotlyarov](https://get-help.theconstruct.ai/u/yury.kotlyarov)\ **Replies:** 1\ **Last updated:** [September 11, 2023, 7:41am UTC](https://get-help.theconstruct.ai/t/cant-find-empty-world-launch-in-unit-3/26205 "2023-09-11T07:41:38Z")
Trying to: roslaunch robot\_description empty\_world.launch and get following: RLException: \[empty\_world.launch\] is neither a launch file in package \[robot\_description\] nor is \[robot\_description\] a launchfile name The t… --- ## [Impossible to save world, Unit 4](https://get-help.theconstruct.ai/t/impossible-to-save-world-unit-4/25760)
**Author:** [@Simo97](https://get-help.theconstruct.ai/u/Simo97)\ **Replies:** 1\ **Last updated:** [August 9, 2023, 11:45am UTC](https://get-help.theconstruct.ai/t/impossible-to-save-world-unit-4/25760 "2023-08-09T11:45:05Z")
Hi! I’m at the beginning of the Unit 4 of the course of Mastering Gazebo Simulator. It seems that it’s not possible to type any name to save the configuration (“File name” in the following figure), so I can’t go on. Wh… --- ## [GAZEBO Introduction quiz error](https://get-help.theconstruct.ai/t/gazebo-introduction-quiz-error/25402)
**Author:** [@AshishVarma](https://get-help.theconstruct.ai/u/AshishVarma)\ **Replies:** 2\ **Last updated:** [July 17, 2023, 12:40pm UTC](https://get-help.theconstruct.ai/t/gazebo-introduction-quiz-error/25402 "2023-07-17T12:40:53Z")
Every option shows wrong answer for this question. please check it and resolve. --- ## [Base\_link and RobotModel are not displayed on the rviz](https://get-help.theconstruct.ai/t/base-link-and-robotmodel-are-not-displayed-on-the-rviz/24473)
**Author:** [@pg01198](https://get-help.theconstruct.ai/u/pg01198)\ **Replies:** 1\ **Last updated:** [May 22, 2023, 8:25am UTC](https://get-help.theconstruct.ai/t/base-link-and-robotmodel-are-not-displayed-on-the-rviz/24473 "2023-05-22T08:25:47Z")
Base\_link and RobotModel are not displayed on the rviz, and I don’t know how to proceed. I copied and pasted “robot.urdf” and “rviz.launch” files exactly the same I had Run “rviz.launch” in the robot\_description packag… --- ## [Curiosity Lection 2 Mastering Gazebo](https://get-help.theconstruct.ai/t/curiosity-lection-2-mastering-gazebo/23729)
**Author:** [@ACTISA](https://get-help.theconstruct.ai/u/ACTISA)\ **Replies:** 4\ **Last updated:** [April 14, 2023, 10:49am UTC](https://get-help.theconstruct.ai/t/curiosity-lection-2-mastering-gazebo/23729 "2023-04-14T10:49:41Z")
Hello, I was wondering if the meassures in the first exercise are correct. In particular, about the front caster wheel. In the picture it says that the diameter is 0.25, but it feels to me that I think 0.25 should be re… --- ## [Cannot Run Gazebo Simulator course](https://get-help.theconstruct.ai/t/cannot-run-gazebo-simulator-course/23723)
**Author:** [@boonchiat](https://get-help.theconstruct.ai/u/boonchiat)\ **Replies:** 3\ **Last updated:** [April 14, 2023, 8:01am UTC](https://get-help.theconstruct.ai/t/cannot-run-gazebo-simulator-course/23723 "2023-04-14T08:01:06Z")
It shows error in “Connection Error” An internal error has occured within the Guacamole server and the connection has been terminated I restart my course, same issues. Could you give me guide to clone the project into … --- ## [Failed to open /opt/ros/noetic/share/rviz/default1.rviz for writing](https://get-help.theconstruct.ai/t/failed-to-open-opt-ros-noetic-share-rviz-default1-rviz-for-writing/23612)
**Author:** [@sdanie20](https://get-help.theconstruct.ai/u/sdanie20)\ **Replies:** 3\ **Last updated:** [April 11, 2023, 4:56am UTC](https://get-help.theconstruct.ai/t/failed-to-open-opt-ros-noetic-share-rviz-default1-rviz-for-writing/23612 "2023-04-11T04:56:28Z")
Hello, I am currently working on Unit2 and am facing this error when I try to save the config. I even tried saving to a new file called default1.rviz and it still says it couldn’t open that file. --- ## [Is any course Gazebo simulator for ROS2 available in this platform](https://get-help.theconstruct.ai/t/is-any-course-gazebo-simulator-for-ros2-available-in-this-platform/23393)
**Author:** [@nadeem](https://get-help.theconstruct.ai/u/nadeem)\ **Replies:** 1\ **Last updated:** [March 28, 2023, 8:46am UTC](https://get-help.theconstruct.ai/t/is-any-course-gazebo-simulator-for-ros2-available-in-this-platform/23393 "2023-03-28T08:46:26Z")
Dear All i am new user and learnt some basic knowledge of ROS2 (humble) basic in python.So any course for ROS2 for gazebo simulator.I think to connect the gazebo in ROS2 is different as compared to ROS and similarly to … --- ## [Gazebo actor not seen by sensors](https://get-help.theconstruct.ai/t/gazebo-actor-not-seen-by-sensors/22666)
**Author:** [@lfernandez](https://get-help.theconstruct.ai/u/lfernandez)\ **Replies:** 11\ **Last updated:** [February 28, 2023, 12:01pm UTC](https://get-help.theconstruct.ai/t/gazebo-actor-not-seen-by-sensors/22666 "2023-02-28T12:01:20Z")
Hi everyone I’ve add an actor in a Gazebo simulation. I’ve read that in order to be this actor detected by the sensor I should change the type from \ **Author:** [@misbahsuhail123](https://get-help.theconstruct.ai/u/misbahsuhail123)\ **Replies:** 2\ **Last updated:** [November 25, 2022, 9:08am UTC](https://get-help.theconstruct.ai/t/unit5-world-plugin/20567 "2022-11-25T09:08:28Z") Hello! In doing given exercise of Unit 5 Gazebo, i am not getting the required result. I used the plugin as mentioned in instructions and as a result a barrier will be shown in gazebo window… but nothing appers in gazeb… --- ## [Controlling moving human](https://get-help.theconstruct.ai/t/controlling-moving-human/20647)
**Author:** [@dhanaprakaashg](https://get-help.theconstruct.ai/u/dhanaprakaashg)\ **Replies:** 2\ **Last updated:** [November 24, 2022, 3:54am UTC](https://get-help.theconstruct.ai/t/controlling-moving-human/20647 "2022-11-24T03:54:42Z")
How to control the moving human actor either by keyboard or programatically? Is there a plugins available for that? Please help!! --- ## [Rviz base\_link query!](https://get-help.theconstruct.ai/t/rviz-base-link-query/20486)
**Author:** [@misbahsuhail123](https://get-help.theconstruct.ai/u/misbahsuhail123)\ **Replies:** 1\ **Last updated:** [November 17, 2022, 12:14pm UTC](https://get-help.theconstruct.ai/t/rviz-base-link-query/20486 "2022-11-17T12:14:32Z")
In Unit 2.1 , creating robot model, using launch file in rviz, the screen appears have the fixed frame base\_link and a box of white color. My question is how rviz knows the box of same size as defined in robot.urdf? Alt… --- ## [Working with the real software or just a web simulation](https://get-help.theconstruct.ai/t/working-with-the-real-software-or-just-a-web-simulation/20503)
**Author:** [@manarksm](https://get-help.theconstruct.ai/u/manarksm)\ **Replies:** 1\ **Last updated:** [November 15, 2022, 4:20pm UTC](https://get-help.theconstruct.ai/t/working-with-the-real-software-or-just-a-web-simulation/20503 "2022-11-15T16:20:39Z")
if i want to start this course ,the simulation will be only web simulation or we will be able to work on the real software too? --- ## [Rviz.launch not loading as intended!](https://get-help.theconstruct.ai/t/rviz-launch-not-loading-as-intended/20494)
**Author:** [@dhanaprakaashg](https://get-help.theconstruct.ai/u/dhanaprakaashg)\ **Replies:** 3\ **Last updated:** [November 15, 2022, 3:11pm UTC](https://get-help.theconstruct.ai/t/rviz-launch-not-loading-as-intended/20494 "2022-11-15T15:11:42Z")
When i launch “rviz.launch” after creating the “robot.urdf” as per the instructions in unit 2, I am getting this ? What should i do to get the desired output? --- ## [Unit 1 quiz question on gazebo GUI](https://get-help.theconstruct.ai/t/unit-1-quiz-question-on-gazebo-gui/20297)
**Author:** [@JRTG](https://get-help.theconstruct.ai/u/JRTG)\ **Replies:** 1\ **Last updated:** [November 4, 2022, 12:04pm UTC](https://get-help.theconstruct.ai/t/unit-1-quiz-question-on-gazebo-gui/20297 "2022-11-04T12:04:12Z")
I would think \ but that is not an option. I tried “world\_name” and “headless” but both fail the test. --- ## [Problem with code Unit 2:Build a Robot](https://get-help.theconstruct.ai/t/problem-with-code-unit-2-build-a-robot/19816)
**Author:** [@tecnicos404](https://get-help.theconstruct.ai/u/tecnicos404)\ **Replies:** 2\ **Last updated:** [October 14, 2022, 7:49pm UTC](https://get-help.theconstruct.ai/t/problem-with-code-unit-2-build-a-robot/19816 "2022-10-14T19:49:34Z")
At the first part of unit 2, we have the following error: \[ WARN\] \[1665409727.074281400\]: The root link link\_chassis has an inertia specified in the URDF, but KDL does not support a root linkwith an inertia. As a worka… --- ## [Explanation missing for another Gazebo Plugin type \[Sensor Plugin (?)\]](https://get-help.theconstruct.ai/t/explanation-missing-for-another-gazebo-plugin-type-sensor-plugin/19888)
**Author:** [@girishkumar.kannan](https://get-help.theconstruct.ai/u/girishkumar.kannan)\ **Replies:** 1\ **Last updated:** [October 14, 2022, 7:35am UTC](https://get-help.theconstruct.ai/t/explanation-missing-for-another-gazebo-plugin-type-sensor-plugin/19888 "2022-10-14T07:35:01Z")
Hi The Construct Team, In the course Mastering Gazebo Simulator, in chapter 5 - Write Gazebo Plugins, the course says that there are three types of plugins discussed but there is only two types explained. The World Pl… --- ## [To use model plugin, how should I change cmakelist?](https://get-help.theconstruct.ai/t/to-use-model-plugin-how-should-i-change-cmakelist/19720)
**Author:** [@tlatmdgus19589](https://get-help.theconstruct.ai/u/tlatmdgus19589)\ **Replies:** 1\ **Last updated:** [October 6, 2022, 12:06pm UTC](https://get-help.theconstruct.ai/t/to-use-model-plugin-how-should-i-change-cmakelist/19720 "2022-10-06T12:06:04Z")
Failed to load plugin liba\_model\_plugin.so: liba\_model\_plugin.so: cannot open shared object file: No such file or directory The above error appears --- ## [Correction Needed - Mastering Gazebo Simulator - Chapter 3 - XACRO](https://get-help.theconstruct.ai/t/correction-needed-mastering-gazebo-simulator-chapter-3-xacro/19523)
**Author:** [@girishkumar.kannan](https://get-help.theconstruct.ai/u/girishkumar.kannan)\ **Replies:** 1\ **Last updated:** [September 27, 2022, 10:18am UTC](https://get-help.theconstruct.ai/t/correction-needed-mastering-gazebo-simulator-chapter-3-xacro/19523 "2022-09-27T10:18:06Z")
Hi The Construct Team, A correction is needed in Mastering Gazebo Simulator course in Chapter 3 - Connect to ROS subdivision 3.4 XACRO = XML + Macro This will be the error if not corrected: Attached image to show t… --- ## [Unit 1 Quiz Don't agree with one of the answers](https://get-help.theconstruct.ai/t/unit-1-quiz-dont-agree-with-one-of-the-answers/19078)
**Author:** [@roman.smid](https://get-help.theconstruct.ai/u/roman.smid)\ **Replies:** 1\ **Last updated:** [September 6, 2022, 4:16pm UTC](https://get-help.theconstruct.ai/t/unit-1-quiz-dont-agree-with-one-of-the-answers/19078 "2022-09-06T16:16:45Z")
is that really the correct answer I think even if real robot is available the developer should first test and evaluate in simulation --- ## [CMake error :Could not find a package configuration file provided by "gazebo"](https://get-help.theconstruct.ai/t/cmake-error-could-not-find-a-package-configuration-file-provided-by-gazebo/18915)
**Author:** [@nayakluckykant01](https://get-help.theconstruct.ai/u/nayakluckykant01)\ **Replies:** 4\ **Last updated:** [August 30, 2022, 8:03am UTC](https://get-help.theconstruct.ai/t/cmake-error-could-not-find-a-package-configuration-file-provided-by-gazebo/18915 "2022-08-30T08:03:23Z")
--- ## [Error while compiling gazebo plugin](https://get-help.theconstruct.ai/t/error-while-compiling-gazebo-plugin/18717)
**Author:** [@HrithikVerma](https://get-help.theconstruct.ai/u/HrithikVerma)\ **Replies:** 6\ **Last updated:** [August 17, 2022, 9:31pm UTC](https://get-help.theconstruct.ai/t/error-while-compiling-gazebo-plugin/18717 "2022-08-17T21:31:21Z")
~/catkin\_ws$ catkin\_make Base path: /home/user/catkin\_ws Source space: /home/user/catkin\_ws/src Build space: /home/user/catkin\_ws/build Devel space: /home/user/catkin\_ws/devel Install space: /home/user/catkin\_ws/install … [Next page](https://get-help.theconstruct.ai/c/course-support/mastergazebosim/83.md?page=1)