# \#roslaunch **URL:** https://get-help.theconstruct.ai/tag/roslaunch/8.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) --- ## [ROS launch error](https://get-help.theconstruct.ai/t/ros-launch-error/26641)
**Author:** [@noor\_akhunji](https://get-help.theconstruct.ai/u/noor_akhunji)\ **Replies:** 2\ **Last updated:** [October 4, 2023, 11:07am UTC](https://get-help.theconstruct.ai/t/ros-launch-error/26641 "2023-10-04T11:07:14Z")
I’m getting this error how can i solve this user:~/catkin\_ws/src$ roslaunch services\_quiz start\_bb8\_move\_in\_square\_service\_server\_launch.launch RLException: \[start\_bb8\_move\_in\_square\_service\_server\_launch.launch\] is ne… --- ## [ERROR: cannot launch node of type](https://get-help.theconstruct.ai/t/error-cannot-launch-node-of-type/20959)
**Author:** [@RC1](https://get-help.theconstruct.ai/u/RC1)\ **Replies:** 3\ **Last updated:** [December 12, 2022, 5:53am UTC](https://get-help.theconstruct.ai/t/error-cannot-launch-node-of-type/20959 "2022-12-12T05:53:10Z")
Issue: cannot launch node of type, Cannot locate node of type What I’ve done: create a pkg and the following: cd catkin catkin\_make source devel/setup.bash chmod +x thecpp.cpp rm -rf /home/user/catkin\_ws/src/ … --- ## [Is there a way to enable roslaunch to load specific parameters in a yaml file](https://get-help.theconstruct.ai/t/is-there-a-way-to-enable-roslaunch-to-load-specific-parameters-in-a-yaml-file/18906)
**Author:** [@zlwnge](https://get-help.theconstruct.ai/u/zlwnge)\ **Replies:** 1\ **Last updated:** [August 30, 2022, 5:54pm UTC](https://get-help.theconstruct.ai/t/is-there-a-way-to-enable-roslaunch-to-load-specific-parameters-in-a-yaml-file/18906 "2022-08-30T17:54:23Z")
Hello everybody, We usually choose to easily configure the parameters by loading the parameters in the yaml file via rosparam, like this: \ \ **Author:** [@vasileios.tzimas](https://get-help.theconstruct.ai/u/vasileios.tzimas)\ **Replies:** 1\ **Last updated:** [August 19, 2022, 7:33am UTC](https://get-help.theconstruct.ai/t/chapter-2-i-do-not-see-the-robot-with-roslaunch/15518 "2022-08-19T07:33:19Z") Hello, I did what I see inside the console and it ran but when I do it on my laptop I get some errors while I have made the necessary changes to the files. The errors are: Why that? --- ## [Unable to connect the ros bridge to unreal engine 4.27](https://get-help.theconstruct.ai/t/unable-to-connect-the-ros-bridge-to-unreal-engine-4-27/18252)
**Author:** [@vinay.nandamuri](https://get-help.theconstruct.ai/u/vinay.nandamuri)\ **Replies:** 1\ **Last updated:** [July 18, 2022, 9:30am UTC](https://get-help.theconstruct.ai/t/unable-to-connect-the-ros-bridge-to-unreal-engine-4-27/18252 "2022-07-18T09:30:09Z")
Getting the below error… ROS\_MASTER\_URI=http://127.0.0.1:11311 process\[rosbridge\_websocket-1\]: started with pid \[21280\] process\[rosapi-2\]: started with pid \[18892\] \[INFO\] \[1658097722.655013\]: Rosapi started 2022-07-… --- ## [Exercise 4.3 I need help](https://get-help.theconstruct.ai/t/exercise-4-3-i-need-help/17940)
**Author:** [@focke1](https://get-help.theconstruct.ai/u/focke1)\ **Replies:** 6\ **Last updated:** [June 28, 2022, 10:02am UTC](https://get-help.theconstruct.ai/t/exercise-4-3-i-need-help/17940 "2022-06-28T10:02:25Z")
I’ve tried the program many times, but I always get the same problem. can you help me please. --- ## [Odom not ready yet, retrying for getting odom](https://get-help.theconstruct.ai/t/odom-not-ready-yet-retrying-for-getting-odom/17161)
**Author:** [@sobek](https://get-help.theconstruct.ai/u/sobek)\ **Replies:** 1\ **Last updated:** [May 9, 2022, 10:57am UTC](https://get-help.theconstruct.ai/t/odom-not-ready-yet-retrying-for-getting-odom/17161 "2022-05-09T10:57:28Z")
we are working on wamv openai-ros example with a q learning agent, and we are trying to launch the start\_training.launch file but it keeps showing this message: \[ERROR\] \[1652090081.679212, 37.905000\]: Current /wamv/odom… --- ## [Quiz Unit 4 launch error](https://get-help.theconstruct.ai/t/quiz-unit-4-launch-error/17072)
**Author:** [@pepemarques01](https://get-help.theconstruct.ai/u/pepemarques01)\ **Replies:** 5\ **Last updated:** [May 6, 2022, 8:43am UTC](https://get-help.theconstruct.ai/t/quiz-unit-4-launch-error/17072 "2022-05-06T08:43:24Z")
I have some problems with this error when I try to launch it. RLException: Invalid roslaunch XML syntax: not well-formed (invalid token): line 1, column 1 The traceback for the exception was written to the log file --- ## [Error while launching the roslaunch file](https://get-help.theconstruct.ai/t/error-while-launching-the-roslaunch-file/16405)
**Author:** [@pedrofpalmeros](https://get-help.theconstruct.ai/u/pedrofpalmeros)\ **Replies:** 2\ **Last updated:** [April 6, 2022, 1:58am UTC](https://get-help.theconstruct.ai/t/error-while-launching-the-roslaunch-file/16405 "2022-04-06T01:58:33Z")
Hi, I did the Challenge topics\_quiz, but the bot says that there is a mistake on the launch file. But it works fine. I checked the solution to see if there was any mistake and the solution is different but my approach w… --- ## [Roslaunch error - ROS Basics in 5days(python) -appendix](https://get-help.theconstruct.ai/t/roslaunch-error-ros-basics-in-5days-python-appendix/16491)
**Author:** [@seunghwa91182](https://get-help.theconstruct.ai/u/seunghwa91182)\ **Replies:** 1\ **Last updated:** [April 1, 2022, 7:42am UTC](https://get-help.theconstruct.ai/t/roslaunch-error-ros-basics-in-5days-python-appendix/16491 "2022-04-01T07:42:03Z")
I’m trying to do a simulation on my computer. First, I downloaded git clone Bitbucket and did catkin\_make. And when I ran roslaunch turtlbot3\_gazebo main.launch, the following error occurred. What should I do? error : … --- ## [Differences between rosrun and roslaunch](https://get-help.theconstruct.ai/t/differences-between-rosrun-and-roslaunch/56)
**Author:** [@bayodesegun](https://get-help.theconstruct.ai/u/bayodesegun)\ **Replies:** 2\ **Last updated:** [January 31, 2022, 8:34am UTC](https://get-help.theconstruct.ai/t/differences-between-rosrun-and-roslaunch/56 "2022-01-31T08:34:18Z")
There are a few differences, but the major ones are: rosrun can only launch one node at a time, from a single package WHILE roslaunch can launch two or more nodes at the same time, from multiple packages roslaunch … --- ## [\[Urgent\] Error during catkin\_make: can't find turtle\_ros\_3d](https://get-help.theconstruct.ai/t/urgent-error-during-catkin-make-cant-find-turtle-ros-3d/12725)
**Author:** [@rt.indru](https://get-help.theconstruct.ai/u/rt.indru)\ **Replies:** 3\ **Last updated:** [September 27, 2021, 9:05am UTC](https://get-help.theconstruct.ai/t/urgent-error-during-catkin-make-cant-find-turtle-ros-3d/12725 "2021-09-27T09:05:58Z")
I am on Chapter 2: TF Publish and Subscribe of the course and I am attempting Exercise 2.1 Unfortunately, when I run catkin\_make, I get the following error: -- +++ processing catkin package: 'your\_package' -- ==\> add\_s… --- ## [Roslaunch error - topics quiz](https://get-help.theconstruct.ai/t/roslaunch-error-topics-quiz/12504)
**Author:** [@surmitbhui2](https://get-help.theconstruct.ai/u/surmitbhui2)\ **Replies:** 3\ **Last updated:** [September 11, 2021, 2:41am UTC](https://get-help.theconstruct.ai/t/roslaunch-error-topics-quiz/12504 "2021-09-11T02:41:48Z")
Hi, I am doing the ROS basics in 5 days and while doing the topics exercise, I am unable to run the launch file. My python script is executable and the node is running perfectly through the rosrun command. I am unable t… --- ## [Basic ROS Learning Week Day 3 - launch file selection problem](https://get-help.theconstruct.ai/t/basic-ros-learning-week-day-3-launch-file-selection-problem/11311)
**Author:** [@gowtham](https://get-help.theconstruct.ai/u/gowtham)\ **Replies:** 6\ **Last updated:** [July 23, 2021, 8:16am UTC](https://get-help.theconstruct.ai/t/basic-ros-learning-week-day-3-launch-file-selection-problem/11311 "2021-07-23T08:16:00Z")
I have started basic ROS learning week from youtube there Mr. Alberto the instructor shared a link in the chatbox to open the ROSJECT of 3rd week But Now the User interface has changed from the current user interface, … --- ## [Error in the launch of the URDF model in Rviz, in personal computer](https://get-help.theconstruct.ai/t/error-in-the-launch-of-the-urdf-model-in-rviz-in-personal-computer/11227)
**Author:** [@GENGIS](https://get-help.theconstruct.ai/u/GENGIS)\ **Replies:** 0\ **Last updated:** [July 17, 2021, 6:19pm UTC](https://get-help.theconstruct.ai/t/error-in-the-launch-of-the-urdf-model-in-rviz-in-personal-computer/11227 "2021-07-17T18:19:20Z")
Hello, everyone. I am trying to build a URDF model with my personal ros, but I get an error (image attached) For what is this? These are the two XML files. --- ## [Robot not moving](https://get-help.theconstruct.ai/t/robot-not-moving/10812)
**Author:** [@Ankit\_Kumar](https://get-help.theconstruct.ai/u/Ankit_Kumar)\ **Replies:** 1\ **Last updated:** [June 29, 2021, 7:54am UTC](https://get-help.theconstruct.ai/t/robot-not-moving/10812 "2021-06-29T07:54:02Z")
Greetings I am trying to complete the first project ROS Basic in 5 days. I wrote the code and launch file for that even then the robot is not moving when I am launching the file. This is launch file \ **Author:** [@Ankit\_Kumar](https://get-help.theconstruct.ai/u/Ankit_Kumar)\ **Replies:** 1\ **Last updated:** [June 29, 2021, 12:39am UTC](https://get-help.theconstruct.ai/t/launch-file-syntax-error/10811 "2021-06-29T00:39:47Z") Greetings, while loading the launch file I am getting an error. Please guide me through this I am new to ROS. --- ## [Ros not working! and src folder content deleted](https://get-help.theconstruct.ai/t/ros-not-working-and-src-folder-content-deleted/10308)
**Author:** [@cjlazar](https://get-help.theconstruct.ai/u/cjlazar)\ **Replies:** 10\ **Last updated:** [June 2, 2021, 1:27pm UTC](https://get-help.theconstruct.ai/t/ros-not-working-and-src-folder-content-deleted/10308 "2021-06-02T13:27:28Z")
Hi, Before my last log off I started to look at the UDRF tutorial. I’m not sure if that may have caused this glitch. I was working on lessons in ROS for Beginners 5 days course and I logged in today and found that all … --- ## [Error launching rbkairos\_planning\_execution.launch](https://get-help.theconstruct.ai/t/error-launching-rbkairos-planning-execution-launch/10072)
**Author:** [@adricaderno](https://get-help.theconstruct.ai/u/adricaderno)\ **Replies:** 2\ **Last updated:** [May 25, 2021, 5:29pm UTC](https://get-help.theconstruct.ai/t/error-launching-rbkairos-planning-execution-launch/10072 "2021-05-25T17:29:25Z")
Hi ROS community! I’m trying to launch this file but I’m getting this error: Do you know what could be the problem? Thanks! --- ## [ROS Basics in 5 Days (C++) Launching Issues](https://get-help.theconstruct.ai/t/ros-basics-in-5-days-c-launching-issues/8499)
**Author:** [@Rjharvey84](https://get-help.theconstruct.ai/u/Rjharvey84)\ **Replies:** 4\ **Last updated:** [April 12, 2021, 8:09am UTC](https://get-help.theconstruct.ai/t/ros-basics-in-5-days-c-launching-issues/8499 "2021-04-12T08:09:37Z")
Hello all, In Unit 1 Example 1.7 I consistently get the error: ERROR: cannot launch node of type \[turtlebot\_teleop/turtlebot\_teleop\_key\]: Cannot locate node of type \[turtlebot\_teleop\_key\] in package \[turtlebot\_teleop\].… --- ## [Unit 2 (unable to roslaunch rbkairos\_moveit\_config rbkairos\_planning\_execution.launch)](https://get-help.theconstruct.ai/t/unit-2-unable-to-roslaunch-rbkairos-moveit-config-rbkairos-planning-execution-launch/8773)
**Author:** [@ChungPuOnn18e2f3338115466d](https://get-help.theconstruct.ai/u/ChungPuOnn18e2f3338115466d)\ **Replies:** 2\ **Last updated:** [March 15, 2021, 6:53pm UTC](https://get-help.theconstruct.ai/t/unit-2-unable-to-roslaunch-rbkairos-moveit-config-rbkairos-planning-execution-launch/8773 "2021-03-15T18:53:01Z")
Hello ROS Developers, may I know why the file cannot be roslaunch eventhough I have tried with the “source devel/setup.bash” and also the “catkin\_make”.