from V10.1 to V11 the random number generator was simplified significantly.
This required some code changes in the experiment manager.
The problem should be resolved when you update the experiment manager library in your model to the most current version.
You can do this in the Library Manager.
The methods you mention can now be configured in the 'Advanced Settings...' dialog which you can open in the 'Tools' menu of the Experiment Manager.
We moved them since for a beginner it was very confusing to know what had to be entered to configure an experiment.
It seems that you are using an user evaluation method which is coming from a previous version which expected only two parameters.
Now this methods expects three parameters: (localExp,localRun,localObserv:integer)
You have to change your user defined evaluation methods accordingly.
You have to change the parameter declaration in your method from
The custom evaluation method now gets an additional argument where you can see in which observation you are.