降压威廉希尔官方网站 仿真报错

Multisim设计50V降压5V威廉希尔官方网站 时发生了芯片错误，有高人指点。。。
注：芯片我是直接添加进去的，使用的是LM5576MH.
Warning: Analysis initial conditions are not set to User-Defined, but initial conditions are set on one or more devices inside U1. The circuit may not simulate as intended.