S参数仿真错误

05-08

仿真时有错误，错误提示如下：
Error detected by hpeesofsim during SP analysis `SP1'. Frequency mapping incomplete: unable to determine small signal operating frequency at node `_net311'
新手不懂，询问师兄，求解

频率映射不正确，找找看你的_net311是什么位置！什么东西来的