I recently became aware of this paper by Francesco Casella regarding "Simulation of Large-Scale Models in Modelica: State of the Art and Future Perspectives" where the lack of Sparse DAE Solvers to work with large Modelica models is addressed. Coming from the System Dynamics - Community, which makes use of ODE/DAE-Modeling in the social sciences and business, I noted that this very feature has been recently implemented by Ventana, a specialized software firm for SD-tools, in their new release of Ventity, an object-oriented simulation tool, that allows sparse structures and dynamic generation of objects/entities.

So the question is: Are there sparse DAE solvers available to simulate SystemModeler-models - especially using Mathematica to do simulation and analysis?

While this is related to an earlier question I posted regarding variable-structure systems, I would like to make this a separate, concise question.