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algebraic loop simulink error؟؟

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mado
mado on 2 Dec 2012
Closed: MATLAB Answer Bot on 20 Aug 2021
when using Ipold= Ip in this embedded function code
function [e,Pm,Ip] = new(In,Vn) persistent Ipold ; if isempty(Ipold) Ipold=2; %initialized only once in the beginning end K1=2; K2=-.195; Pn= Vn*In Pm=100*In e= Pn-Pm if Pn>Pm Ip = Ipold+K1 *e else Ip = Ipold+K2 *e end Ipold=Ip
error message appeared "Trouble solving algebraic loop containing 'chee_pv/pv6/Algebraic Constraint/Initial Guess' at time 0. Stopping simulation. 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)"
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