I want to do connection between MATLAB and Gazebo and generate Gazebo model from MATLAB. I follow the instruction in [add-build-and-remove-objects-in-gazebo](https://www.mathworks.com/help/robotics/examples/add-build-and-remove-objects-in-gazebo.html), and the following commands work successfully.
rosinit(ipaddress)
gazebo = ExampleHelperGazeboCommunicator;
ball = ExampleHelperGazeboModel('Ball')
spherelink = addLink(ball,'sphere',1,'color',[0 0 1 1])
But when I run the next command `spawnModel(gazebo,ball,[8.5,0,1])`, the errors show up in MATLAB command window:
Error using ExampleHelperGazeboCommunicator/startModelServices (line 334)
Failed to create a /gazebo/get_model_state service client.
Error in ExampleHelperGazeboCommunicator/spawnModel (line 290)
startModelServices(obj);
[ERROR] ServiceClientHandshakeHandler - Service client handshake failed: client wants service
/gazebo/get_model_state to have md5sum af0f702011820738976b120226dc9d96, but it has
4c515e936d3319c9610c559c60bfc3d4. Dropping connection.
The error shown in ubuntu terminal is
[ERROR] ServiceClientHandshakeHandler - Service client handshake failed: client wants service
/gazebo/get_model_state to have md5sum af0f702011820738976b120226dc9d96, but it has
4c515e936d3319c9610c559c60bfc3d4. Dropping connection.
I use matlab 2018b, Robotics System Toolbox2.1 on win10, and Ubuntu18.04, ROS melodic, gazebo9 in virtualbox, which are all newest version. Does anyone know how to solve it?
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