The issue is triggered by passing a SimulationInput object as an argument to a postSimFcn:
>>SimIn(idx) = SimIn(idx).setPostSimFcn(@(x) postsim(x, SimIn(idx)));
Using the SimulationInput object as an input argument of the anonymous function in this callback can cause a circular reference which led to runaway memory usage during the serialization of parsim and batchsim initialization.
A workaround is to use a temporary variable for the SimIn element instead of passing the simulation input object itself.
>>tmpSimIn = SimIn(idx);
>>SimIn(idx) = SimIn(idx).setPostSimFcn(@(x) postsim(x, tmpSimIn));
