> Just ran the script and there was no crash. However, the fits are rubbish. Is that expected for this example? > > Also in the parameter table, which values should be the same? Yes, I would not expect good fits for this example. It is just a very simple example from the unit tests with very few iterations so it does not take too long to run it. Some parameter like FWHM will not change much (if at all) after such a short time.