Hi Daniel,
As per my understanding, you want to simulate the PEM Fuel Cell Simscape model example using discrete fixed-step solver. And to achieve the same have changed all continuous blocks to their discrete equivalent, but Membrane Electrode Assembly block is still continuous.
“FixedStepDiscrete” solver cannot be used with Simscape products because those models will always include continuous states. A possible workaround is to use solvers like “ode1” or “ode2” which permits fixed step simulation of models that include continuous states.
Please refer to the below documentation for more information on how to choose a solver:
Hope this helps!
