[ERROR] NO LOAD CASE INCLUDED IN THE JOB IS DEFINED AS 'DESIGN LOAD CASE in STAAD Foundation Advanced

I am using Staad foundation advanced to design my piling foundation. However, I got a error message :" [ERROR] NO LOAD CASE INCLUDED IN THE JOB IS DEFINED AS 'DESIGN LOAD CASE'". Please let me know how to solve this issue. Thanks.