Open the model and define a vector of Mu values.

open_system('vdp');
Mu_Values = [0.5:0.25:1000];
MuVal_length = length(Mu_Values)

Using Mu_Values, initialize an array of Simulink.SimulationInput objects. To preallocate the array, a loop index is made to start from the largest value.

for i = MuVal_length:-1:1
    in(i) = Simulink.SimulationInput('vdp');
    in(i) = in(i).setBlockParameter('vdp/Mu',...
        'Gain',num2str(Mu_Values(i)));
end

Simulate the model using parsim. Set to 'RunInBackground' to enable the use the command prompt, while simulations are running.

Future = parsim(in,'RunInBackground','on');

Now, assume that you want to run simulations with different values of Mu and cancel the ongoing simulations.

cancel(Future)