Non-sampled zero crossings

Question

Hi!

I have this error "Maximum number of iterations exceeded during evaluation of non-sampled zero crossings. Please try reducing the sample time or increasing the refine factor."

The model runs in fixed-step and whenever I reduce the sample time, the memory is full and the model can't run.
Thank you!

Answer 1

Your model has many scopes and a small time step.  The combination requires large amounts of memory to store the simulation data. See: https://www.plexim.com/support/solutions/151

The model also uses the "Memory" block in many locations.  This means that changing the fixed step size changes the delays in your system which is not desirable.  I would advise using a variable-step solver and replacing the variable "Memory" delays with "Zero order holds" or discrete delays as appropriate.  The C-Scripts may also require some small modifications to support a variable step solver.