The "FixedStepDiscrete" solver cannot be used to simulate block diagram because it contains continuous states.What is the meaning of this?

when i was doing my electrical model design & software in loop i got this problem so please give me suggestion.

Answer 1

[Sabin]

If the model contains continuous-time blocks like Integrators, Continuous State-Space/Transfer Function, etc., it is not possible to use a discrete solver, as it does not support continuous states. You can still simulate using fixed-step solvers such as ode1, ode3, ode14x, ode1be. Alternatively you can replace continuous-time blocks with discrete-time blocks.