計算S參量時出現的錯誤

我在計算S參量時出現這樣的錯誤，請教高手怎么解決？
[error] Fast sweep setup, process abc3d : "WavePort1" mode 1 crosses cut-off in the specified fast sweep range.Consider splitting the sweep into multiple ranges.Use a port-only discrete sweep to locate the cut-off frequency. (9:42 上午三月 17, 2010)
[error] Simulation completed with execution error on server: Local Machine. (9:42 上午三月 17, 2010)

看上去可能是網格太密導致fast參數掃描報錯，用離散參掃試試看。