Simulation error in Matlab. How to solve algebraic equation in differential-algebraic system?

An error occurred while running the simulation and the simulation was terminated Caused by: Trouble solving algebraic equations in differential-algebraic system. Singular iteration matrix encountered with step size 1.3112237312354995E-72 at time 0.0. Try tightening the error tolerances. If the problem persists, check the model structure and values of parameters.