I'm running the FFD co-simulation model, Buildings.ThermalZones.Detailed.Examples.FFD.Tutorial.NaturalConvection, but it failed to simulate (are able to compile).  The error message says "Failed to solve linear system of equations (no. 660) at time 0. Residual norm is 0.63.....".

As per Buildings test, it says that this model is compatible with OpenModelica. However, I wasn't able to replicate their results. I'm wondering if there's a specific setting that I'm missing.

Any help or suggestions on how to debug will be appreciated.