MATLAB-ROS handshake fail

Hello, i am doing something using MATLAB-ROS interface in Ubuntu 16.04 LTS with ROS kinetic.

And also, i am starting with 'GazeboAddBuildAndRemoveObjectsExample' MATLAB example code.

But there are some errors.

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 in Gazebo (line 40)
spawnModel(gazebo,ball,[8.5,0,1]);

[ERROR] ServiceClientHandshakeHandler - Service client handshake failed: client wants service /gazebo/get_model_state to have md5sum af0f702011820738976b120226dc9d96, but it has 4c515e936d3319c9610c559c60bfc3d4. Dropping connection.

I knew that service and client have to indicate the same md5sum for communication. So i have tried to change md5sum in gazebo_msgs to indicate same things, but i didn't work. How can i solve this problems?

Answer 1

[Florian Kraemer]

You can verify the internal matlab rosmsg is the same as in ROS. In matlab:

 rosmsg('show','package/srv_nameRequest')
 rosmsg('show','package/srv_nameResponse')

And in a terminal:

 rossrv show package/srv_name

They probably differ, which since this is a standard example is probably a version incompatibility issue.