My ROS system is ROS2 foxy, but there was an error compiling ROS bridge on Ubuntu 20. I don't know how to solve it

[xoxclouds]

My ROS system is ROS2 foxy, but there was an error compiling ROS bridge on Ubuntu 20. I don't know how to solve it

[JiBingdong]

@xoxclouds can you post the solution? It may be useful for other people in the future

I also encountered this issue, do you resolved this issue? PS: i try your answer in the top, but it does not work on my system.
I have already resolved this issue on my end.

``` pip install empy==3.3.4

[FelipeGdM]

Have you installed all dependencies? This error may be caused by a missing dependency

You may try

rosdep install --from-paths src --ignore-src -r -y

Then try to compile the project again with

colcon build --cmake-clean-first

The flag --cmake-clean-first is needed because some intermediary object files may be broken due to missing dependencies, so it's better to attempt a fresh start

[zhangjiatao]

I also encountered this issue, and the compilation error occurred on Python 3.11. I was able to resolve it by recompiling on Python 3.8.

[xoxclouds]

Thank you for your feedback. I have already resolved this issue on my end.

[FelipeGdM]

@xoxclouds can you post the solution? It may be useful for other people in the future

[xoxclouds]

@FelipeGdM My ubuntu system crashed. I reinstalled ubuntu and compiled again and there was no problem. I may not be able to provide much help, I'm very sorry.

[is-whale]

是否安装了所有依赖项？此错误可能是由缺少依赖项引起的

你可以试试

rosdep install --from-paths src --ignore-src -r -y

然后尝试再次编译项目

colcon build --cmake-clean-first

该标志是必需的，因为某些中间对象文件可能会由于缺少依赖项而损坏，因此最好尝试重新开始--cmake-clean-first

oh ! I love U so much!!!

[JiBingdong]

@xoxclouds can you post the solution? It may be useful for other people in the future

I also encountered this issue, do you resolved this issue?
PS: i try your answer in the top, but it does not work on my system.