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Known issues
This is an error with the default Gazebo version for Ubuntu 18.04. You can solve it modifying one line in one file. You need to change ~/.ignition/fuel/config.yaml as following:
to
Seen here.
It is probably a permission problem, and happens when you have compiled PX4 using sudo (which you shouldn't). Check who owns the files /tmp/px4-sock-*. If it is root, this is your problem. Go to the Firmware folder and do make clean and then make.
Seen here.
If you are using a custom world file, make sure you have the following parameters:
<max_step_size>0.004</max_step_size>
<real_time_factor>1</real_time_factor>
<real_time_update_rate>250</real_time_update_rate>
Otherwise, it could cause this error. Related to this issue.
We don't know exactly which version of Mavros causes this and why, but updating to 0.28.0 fix the issue.
#error regenerate this file with a newer version of protoc
This error comes from having a protobuf version higher than 2.6.1, which was used to compile gazebo 7.0.0 messages. If protoc --version gives you 3.x.x, you need to install version 2.6.1:
wget https://github.com/google/protobuf/releases/download/v2.6.1/protobuf-2.6.1.tar.gz
tar xzf protobuf-2.6.1.tar.gz
cd protobuf-2.6.1
sudo apt-get update
sudo apt-get install build-essential
sudo ./configure
sudo make
sudo make check
sudo make install
sudo ldconfig
protoc --version
Credits for https://gist.github.com/samklr/0b8a0620f82005e7f556.