Using the implicit solver in compound blocks

If you have a subsystem with local bounds that also contains implicit equations, you must activate Use Implicit Solver in the dialog for the compound block to use an implicit solver to solve the equations. You must activate this option regardless of whether you have activated an implicit solver under Simulate > System Properties > Implicit Solver.

After you activate the Use Implicit Solver option, click the Setup Solver button to display the Implicit Solver Properties dialog.