Duplicating Simulink Blocks within a subsystem

Hi,

I'm building a rather complicated SimeEvents model, but made a simple case for the question that I have. I have an entity generator that creates passengers for 2 "Taxi's" (Entity Server). I would like to create a system in which the amount of taxi's is variable, so I made a subsystem in which I added the parameter "Taxi". This parameter is used to know the amount of taxi's for generating new blocks.

Now I use the Initialization tab of the Mask of the Subsystem to build all new blocks (add_block, add_line, set_param,...), such that it builds the model with 1 Entity Server/Terminator leaving from the Entity_Switch for each taxi.

My question: How do I adapt this model such that I can run it multiple times with a different amount of taxi's.

At the moment it doesn't work because the blocks cannot be created once they exist. So, the first simulation works, the second fails. I tried 'delete_block' inside the StopFcn but this failed because the StopFcn is executed within the simulation.

I also thought about just reloading the model before each simulation, such that all created content was removed again, but I didn't manage to get this working either.

In the original problem I have about 7 times the amount of taxis of blocks that need to be created, so copying all blocks by hand for each number of taxi's cannot be the best solution.