ros node does not change its name after restart

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Hello everybody,

actually I'm working on a c++ s-function in Matlab Simulink that is able to comunicate to ros. Therefore I initialize the ros node once by

ros::int(argc, argv, nodeName);

and terminate the node by

ros::shutdown();

Therewith I can create and destroy a ros node.

The issue I have with this is, that after once starting and ending a simulink model, the ros node name can't be changed. Even by starting another model the node name is not changed. I tried changing nodeName and also the command line arguments argc and argv ( __name:=NodeName ). It only changes after a recompile of the s-function or by a restart of matlab. What can I do with this?

Many thanks for your answers in advance.