求救simulink 出现错误

小凡

我做了一个模型，运行的时候出现错误了……

Derivative input 1 of 'nnew/Integrator' at time 0 is Inf or NaN.  Stopping simulation.  There may be a singularity in the solution.  If not, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances).

怎么改正啊 ~~谢谢

messenger

参考此贴，http://forum.simwe.com/thread-58397-1-1.html