请问这是个啥错误？？

清风把盏

ERROR
There are no fictitious supports defined in the model.
( O( p% C# L& _+ A( cSolution type "SOL 103*" requires the presence of at least one fictitious support when
" V& ^1 I7 y+ \( K2 ^! Zinertia relief is requested.

, t6 i' ?+ k0 M9 p8 u老师们，这个错误啥意思？