Hi,i have a large simulink model.sampling time specified as 500.Actually i have included some initial values as zero my model is running upto 479.85 and after that it gives an error message like this.

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DhanaLakshmiR 2017-8-30

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https://ww2.mathworks.cn/matlabcentral/answers/354525-hi-i-have-a-large-simulink-model-sampling-time-specified-as-500-actually-i-have-included-some-initia

Simulink cannot solve the algebraic loop containing 'changesinpdsconstantisgiven/Force/Mul10' at time 479.85 using the TrustRegion-based algorithm due to one of the following reasons: the model is ill-defined i.e., the system equations do not have a solution; or the nonlinear equation solver failed to converge due to numerical issues. To rule out solver convergence as the cause of this error, either a) switch to LineSearch-based algorithm using set_param('changesinpdsconstantisgiven','AlgebraicLoopSolver','LineSearch') b) reducing the fixed step size. If the error persists in spite of the above changes, then the model is likely ill-defined and requires modification.