在仿真过程中出现下列报错,做了很久还是没法解决,请大家帮忙看看,Unable to reduce the step size without violating minimum step size of 0.0005 at time 0.03412942424931665. Continuing simulation with the step size restricted to 0.0005 and using an effective relative error tolerance of 0.02661521701524314, which is greater than the specified relative error tolerance of 0.01.这是怎么回事,怎么解决啊?