请问这是个啥错误？？

清风把盏

ERROR
* `2 l2 O0 a$ z2 ^8 vThere are no fictitious supports defined in the model.
& q& G8 ~* G& s- l( b8 Y7 U7 GSolution type "SOL 103*" requires the presence of at least one fictitious support when
inertia relief is requested.
$ f* g" ^. z; l1 r
' X- v' Z2 T" y: q' e# A老师们，这个错误啥意思？