请问这是个啥错误？？

清风把盏

ERROR
There are no fictitious supports defined in the model.
Solution type "SOL 103*" requires the presence of at least one fictitious support when
, H. g0 N$ Q& Z4 `  Einertia relief is requested.
' M( I2 `* W/ U: y; m
老师们，这个错误啥意思？