The Solver Profiler supports Jacobian logging and analysis for implicit solvers only.
You can select the Model Jacobian check box in the Solver Profiler to log updates to the Jacobian matrix for the model. When you run the Solver Profiler on a model, you can see the logs in the Jacobian Analysis tab.
The Jacobian Analysis tab indicates the states in the model that are likely slowing down the solver.
To investigate the cause of each limiting state, select a row in the Jacobian Analysis tab and click Highlight Block.