I created a PV module connected to a buck converter using P&O MPPT algorithm connected to a load of 30 ohms.

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I am receiving an error "Algebraic state in algebraic loop containing 'buck1/PV panel/Vpv array/do not delete this gain' computed at time 0.0 is Inf or NaN. There may be a singularity in the solution. If the model is correct, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances)". I used a unit delay in the feedback but my output is "nan" in the display block. I would be obliged if anyone can help me obtain the solution.