SG3525A制作功放电源仿真失败

SG3525A制作功放电源仿真失败，错误提示：

*** ERROR "CLASS_NOT_POSITIVE" *** TStep must be positive.

*** ERROR "UI_VALUE_ERROR" *** Value error.

未解决。求解？/upload/community/2020/07/15/1594782649-51263.zip