UDP-Communication between Simulink-Models

Hi!

I am trying to build up a UDP communication between two SIMULINK-Models, which are running in different MATLAB instances. There I have still a problem receiving data from the model. I get the same error while running the following simple example:

I get the following error:

"The specified amount of data was not returned within the Timeout period. Please ensure that data is being sent to the specified port or specify a greater timeout value."

Increasing the timeout value doesn't effect anything. Also the connection check was successfully.

Do you have any idea how to solute the problem?

Thank you very much in advance!