在網上下載了一個Saber仿真反激實例。不做任何更改是可以仿出來的。當我該變一個電阻的阻值參數后出現了這條語句：“ Cannot perform alter command. You must re-netlist this design before doing any simulation.” 然后我保存再仿真就出現了兩條錯誤:*** ERROR "ALG_NO_SOLUTION" *** Cannot find nonlinear system solution.

               *** ERROR "ALG_NOT_FINITE" *** The nonlinear solution yields a value that is Inf or NaN. Increasing nsdensity (currently 1) may help.

請問如何在搭建好的仿真實例上再進一步的修改仿真。我也是剛用Saber，請大家不吝賜教。