AibohphobiA's profile - activity

Hi there, I am trying to integrate an existing functioning package with a custom message(so far it has been divided to two projects).

I am failing when trying to modify the CMakeLists with the following interface:

rosidl_generate_interfaces(${PROJECT_NAME} 
  ${msg_files} 
)

I am getting the following error:

CMake Error at /opt/ros/humble/share/rosidl_cmake/cmake/rosidl_generate_interfaces.cmake:213 (add_custom_target):
  add_custom_target cannot create target "myPackage" because another target
  with the same name already exists.  The existing target is a shared library
  created in source directory "/home/user/ros2_ws/src/inuros2".  See
  documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  CMakeLists.txt:110 (rosidl_generate_interfaces)

My Cmake up to that point is as follows:

cmake_minimum_required(VERSION 3.8)

project(myPackage)

if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")

  add_compile_options(-Wall -Wextra -Wpedantic)

endif()

find_package(ament_cmake REQUIRED)
find_package(cv_bridge REQUIRED)
find_package(rclcpp REQUIRED)
find_package(rclcpp_components REQUIRED)
find_package(rosidl_default_generators REQUIRED)

set (SOURCES
       ...
        )

set (INCLUDES
       ...
        )

add_library(${PROJECT_NAME} SHARED
        ${INCLUDES}
        ${SOURCES}
        )

set(dependencies
        cv_bridge
        rclcpp
        ...
        )

ament_target_dependencies(${PROJECT_NAME}
        ${dependencies}
        )

rclcpp_components_register_node(${PROJECT_NAME}
  PLUGIN "Class::NodeName"
  EXECUTABLE MyPackageExecutable
)

set(msg_files
  "msg/Features.msg"
)

rosidl_generate_interfaces(${PROJECT_NAME}
  ${msg_files}
)

Any help would be great.

Thanks!

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Thanks for your help!

Hi there, I'm trying to install ROS melodic and following: http://wiki.ros.org/melodic/Installat...

after calling:

sudo apt install python-rosdep

I follow up with:

sudo rosdep init

and getting:

ERROR: default sources list file already exists:
/etc/ros/rosdep/sources.list.d/20-default.list
Please delete if you wish to re-initialize

I tried deleting and running init - which then asks me to update and goes back to the error above.

Any help would be great!

Thanks.

Full console log:

user@sharon-VirtualBox:~$ sudo rosdep init
ERROR: default sources list file already exists:
    /etc/ros/rosdep/sources.list.d/20-default.list
Please delete if you wish to re-initialize
user@sharon-VirtualBox:~$ sudo rm /etc/ros/rosdep/sources.list.d/20-default.list 
user@sharon-VirtualBox:~$ sudo rosdep init
Wrote /etc/ros/rosdep/sources.list.d/20-default.list
Recommended: please run
    rosdep update
user@sharon-VirtualBox:~$ rosdep update
reading in sources list data from /etc/ros/rosdep/sources.list.d
Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/osx-homebrew.yaml
Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/base.yaml
Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/python.yaml
Hit https://raw.githubusercontent.com/ros/rosdistro/master/rosdep/ruby.yaml
Hit https://raw.githubusercontent.com/ros/rosdistro/master/releases/fuerte.yaml
Query rosdistro index https://raw.githubusercontent.com/ros/rosdistro/master/index-v4.yaml
Skip end-of-life distro "ardent"
Skip end-of-life distro "bouncy"
Skip end-of-life distro "crystal"
Skip end-of-life distro "dashing"
Skip end-of-life distro "eloquent"
Add distro "foxy"
Add distro "galactic"
Skip end-of-life distro "groovy"
Add distro "humble"
Skip end-of-life distro "hydro"
Skip end-of-life distro "indigo"
Skip end-of-life distro "jade"
Skip end-of-life distro "kinetic"
Skip end-of-life distro "lunar"
Add distro "melodic"
Add distro "noetic"
Add distro "rolling"
updated cache in /home/user/.ros/rosdep/sources.cache
user@sharon-VirtualBox:~$ sudo rosdep init
ERROR: default sources list file already exists:
    /etc/ros/rosdep/sources.list.d/20-default.list
Please delete if you wish to re-initialize
user@sharon-VirtualBox:~$

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Hi and thanks for reading. I am trying to add a custom message to my project, but for some reason I cannot update the values. I simplified the message package to hold a simple String type which still doesn't work. the message catkin_pkg builds without any errors. features_msg.msg:

std_msgs/String tmp

in the .cpp file, I am calling:

    features_tracking_msg::features_msg features;
    features.tmp = "testing";

and getting: No viable overloaded '='

Any help would be appreciated!

Thanks! I don't know how, but in the following tutorial(which I used) he uses std_msgs::String and then assigns an std::

Cannot insert values in custom message Hi and thanks for reading. I am trying to add a custom message to my project, but