请教错误提示

ltl185

*** OptiStruct defaults set from:
   install config file: C:\Altair\hw10.0/hwsolvers/hwsolver.cfg


NOTE # 1929
Created RAM scratch area: total size 30 MB.


*** WARNING 1931:   FORCE      1 is not referenced by Case Control.

*** WARNING # 1908
Case Control data LOAD,2
is not referenced by any bulk data.
  No Available License
RADIOSS/OptiStruct ERROR: 1.
请问这个问题怎么解决