I'm trying to use a simple electrical circuit with one diod on Openmodelica 1.9.3. I wrote the code below :

model TKJ1

  Modelica.Electrical.Analog.Sources.SineVoltage sinevoltage(V = 100, freqHz = 235);

  Modelica.Electrical.Analog.Basic.Resistor resistor(R = 0.001);

  Modelica.Electrical.Analog.Basic.Inductor inductor(L = 1e-6);

  Modelica.Electrical.Analog.Basic.Resistor Rcharge(R = 100);

  Modelica.Electrical.Analog.Semiconductors.Diode diode1;

  Modelica.Electrical.Analog.Basic.Ground ground;

equation

  connect(ground.p, Rcharge.n);

  connect(Rcharge.p, diode1.n);

  connect(diode1.p, inductor.n);

  connect(inductor.p, resistor.n);

  connect(resistor.p, sinevoltage.p);

  connect(ground.p, sinevoltage.n);

end TKJ1;

With the defaut simulation parameters, the simulation failed with the following message :

LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
stdout | warning | <p>The corrector could not converge.</p>
stdout | warning | <p>can't continue. time = 0.005647</p>
stdout | info | <p>model terminate | Integrator failed. | Simulation terminated at time 0.0056473</p>
LOG_STATS | info | <p>### STATISTICS ###</p>
stdout | error | <p>Process crashed<br>
Simulation process failed. Exited with code -8.</p>

I changed the maximum step size after event detection to 1e-6. The simulation finished correctly :

LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_NLS_V | warning | <p>Warning: maximal number of iteration reached but no root found</p>
LOG_STATS | info | <p>### STATISTICS ###</p>
stdout | OMEditInfo | <p>Simulation process finished successfully.</p>

The results are correct but the warnings are still there. It seems that diode model is very sensitive to simulation parameters. Any help on this topic will be deeply appreciated.