Runtime Engine

My simulation will not even start and this message appears, why does this happen?

My simulation stopped suddenly with this message, but it had been running fine up until then, why does this happen?

I want to run a new simulation using a previous system state, for example to get past start-up transients in my system. Is this possible?

I was running a simulation and it stopped due to a memory issue. How can I deal with this and is there any way to get the simulation data that was calculated before the simulation stopped?

I notice that the output in the scope appears more or less correct but the curve is jagged and not smooth. I can reduce the step size or tolerances and the output becomes more smooth, but this is at a cost of simulation speed. Is there a better solution?

I have tried multiple settings and the waveforms before the error occurs look good. What is the reason for this error and is there anything I can do about it?