I am new to ROS, I have a problem when I import rospy into my script file example.py and run it: It says: Traceback (most recent call last): File "/home/nagarjunv/hk_ws/src/rvo/src/example.py...

My python code gives this error: from cv_bridge import CvBridge, CvBridgeError ImportError: libcv_bridge.so: cannot open shared object file: No such file or directory. However if I do a ldd, ev...

I am working with ROS. ROS needs to source a few scripts e.g., /opt/ros/noetic/setup.sh before running any python programs. Otherwise I cannot import roslib or similar stuffs. When I debug with vsc...

My current workflow for a project is the following: build the project (via catkin) source a setup.sh script (generated by catkin, which I wouldn't like to modify) setting environment variables an...

Traceback (most recent call last): File "/opt/ros/melodic/share/gencpp/cmake/../../../lib/gencpp/gen_cpp.py", line 50, in <module> sys.argv, msg_template_map, srv_template_map) F...

I have an inference code in TensorRT(with python). I want to run this code in ROS but I get the below error when trying to allocate buffer: LogicError: explicit_context_dependent failed: invalid d...

I am running ubuntu 14.04 and trying to launch ROS Simulator. I have this error: ImportError: No module named 'glob' Installing glob2 does not solve the problem. python -m site output: sys.pat...

I want to ask how to find all the executable names of a package in ROS (Robot Operating System)? For example, find spawn_model in gazebo_ros package. When I inspect the package in my system, it jus...

I am having some lag issues with a rospy subscriber listening to image messages. Overview: I have a rosbag streaming images to /camera/image_raw at 5Hz. I also have an image_view node for displa...

I had a computer vision project on Ubuntu 14.04 with ROS indigo and python3, then I had to move on Ubuntu 16.04 with ROS kinetic. Here I ran into multiple issues: 1) I installed opencv, but couldn...

I'm new to ros+python and i'm trying to publish a 1-D array from python ros node. I used Int32MultiArray but i cant understand the concept of layout in multiarray. Can anyone explain it to me? or i...

I am trying to run:- roslaunch turtlebot_gazebo turtlebot_world.launch but I am getting following error Traceback (most recent call last): File "/opt/ros/kinetic/share/xacro/xacro.py", line 55, ...

I have an Apache web server and I made a python script to run a command. Command that I'm running is launching a ROS launch file, that is working indefinitely. I would like to read output from the ...

I couldn't understand the CMake documentation for install. I have a sample cmake file, where an executable is generated by add_executable(${PROJECT_NAME}_node src/filename.cpp) Then later installe...

I got an ImportError while trying to create a custom interface following the ros2 tutorial Creating custom msg and srv files. The project looks like this: src/tutorial_interfaces/ ├── CMakeLists.tx...

I am using ROS and C++ and ROS packages have a CMakeLists.txt in them. I would like to have a syntax highlighting for CMakeLists.txt in visual studio code. Unfortunately, I searched on the interne...

I am new to ROS and rospy, and I am not familiar with non-simple data type as topic. I want to build a ROS node as both a subscriber and publisher: it receives a topic (a list of two float64), and...

The sequence of steps listed in http://wiki.ros.org/kinetic/Installat... have been followed. (Trying to install ROS kinetic in Ubuntu 16.04) Error when entering the following command : $sudo apt-g...

I am new to ROS, I just opened a terminal and typed roscore and another terminal and typed rostopic node and I got this error that says Failed to load Python extension for LZ4 support. LZ4 comp...

I'd like to kill a rosbag instance gracefully via terminal. Gracefully means in that case, that the rosbag file doesn't have the suffix .active after kill. so I do the following from terminal to s...

Whenever I try to create a workspace: ~/catkin_ws$ catkin_make It shows like this: ImportError: "from catkin_pkg.package import parse_package" failed: No module named 'catkin_pkg' Make sure th...

I'm trying to install ROS on Ubuntu. I'm getting this error: sudo apt-get update Hit:1 http://pk.archive.ubuntu.com/ubuntu cosmic InRelease Hit:2 http://pk.archive.ubuntu.com/ubuntu cosmic...

I have first installed openCV from source using this script. When I tested it was working well. After I installed ROS kinetic, and open python3 and run import cv2 as cv, got the following error: Py...

I'm trying to compile a package using Ros Indigo. I'm using a Raspberry Pi running Raspbian. The BZIP2_LIBRARIES BZIP2_INCLUDE_DIR are missing. When I run the make command, I get the following erro...

ROS Fuerte I installed on my machine uses opencv 2.2. I would like to use 2.4.9 version just installed. Its location is /home/polar/soft/lib/opencv/opencv-2.4.9/build/lib. How to do that with CMak...