You are using rather old OpenModelica. Interactive simulation has been removed now.

Download the latest version https://build.openmodelica.org/omc/buil … ly-builds/
OR
Download the old version perhaps 1.8.0 where interactive simulation was funtional.

Adeel.

If interactive simulation is removed now in the latest OpenModelica version, how can one work on changing the model parameters during simulation running? Does that mean that with the latest OpenModelica, one can only have static and predefined parameters for the model used?

The users documentation that I am using in from 2014-10-24 for OpenModelica 1.9.1.

Yes, parameters in the Modelica spec are not supposed to be possible to change. The only things you should be able to change are tuneable parameters (at initialization), and top-level inputs (I think only via input files for now).

So Chap.5 of the latest user documentation is no longer true?

No. It was supposed to have been removed already. But probably was re-introduced during some 3-way merge of Word documents (hard to detect when we do not use LaTeX)

Thank you for pointing that out.

Do you know if there is another workaround for my problem? I would love to change some parameters of my model during simulation. Is the function available with Dymola?

No idea if they have this in Dymola.

You could make a bigger model in which your model is a component and then use when equations to change values of
variables at different times during the simulation. The only problem with this is that it doesn't work for parameters, just
variables.

Thank you. I will try out as advised.