Error using ros2genmsg("custom")

Hello, I am following this Matlab example: Control a simulated UAV using ros2 and PX4 bridge

When running the command:

ros2genmsg("custom")

it returns the error:

>> ros2genmsg("custom")
Identifying message files in folder '/Users/xxxx/MATLAB/xxxx/custom'..Validating message files in folder '/Users/xxxx/MATLAB/xxxx/custom'..Done.
Done.
[1/1] Generating MATLAB interfaces for custom message packages... Done.
Running colcon build in folder '/Users/xxxx/MATLAB/xxxx/custom/matlab_msg_gen/maca64'.
Build in progress. This may take several minutes...Error using ros.internal.ROSProjectBuilder/buildPackage
Error building package: build_log.

Error in ros2genmsg (line 467)
        buildPackage(builder, [], ' --merge-install', colconMakeArgs);

Any help?

Similar posts didn't help to get this fixed.

I am on Matlab 2023b for macOS.

Thanks!

Answer 1

[Panos]

Issue resolved by Mathworks support team. This is the solution,

This issue appears to be caused by a small syntax error in the code within the "px4_msgs" folder.

As a workaround, could you please do the following:

1. In the MATLAB command window, unzip the "px4_msgs" folder:

unzip("px4_msgs.zip")

2. Navigate to px4_msgs/msg/VehicleCommand.msg file, and open it

3. Scroll to the end of line numbers 40 and 41 in VehicleCommand.msg, and remove the "*/" symbols from both lines

4. Run "ros2genmsg("custom")" again

This worked for me.

Thanks

Answer 2

[HARUN KURT]

I getting error like this.

-- Generating done -- Build files have been written to: C:/Users/Harun/Documents/MATLAB/Examples/R2024a/uav_ros/ControlASimulatedUAVUsingROS2AndPX4BridgeExample/custom/matlab_msg_gen/win64/build/px4_msgs ninja: error: Stat(C:/Users/Harun/Documents/MATLAB/Examples/R2024a/uav_ros/ControlASimulatedUAVUsingROS2AndPX4BridgeExample/custom/matlab_msg_gen/win64/build/px4_msgs/rosidl_typesupport_fastrtps_c/px4_msgs/msg/detail/autotune_attitude_control_status__rosidl_typesupport_fastrtps_c.h): Filename longer than 260 characters