请问这是个啥错误？？

清风把盏

ERROR
2 u- `& q/ r# e& J# c+ l7 GThere are no fictitious supports defined in the model.
& \7 Y' s  e& F  K6 S4 b7 Z% MSolution type "SOL 103*" requires the presence of at least one fictitious support when
# k6 _4 p4 z( I4 L: G, {( X% cinertia relief is requested.
  C2 I' c4 Q# a$ W! }4 Z# K( Y  g
老师们，这个错误啥意思？