Sateesh,
Thanks for your response. Yes your formula helps deriving month from date, but what i was expecting is deriving fiscal month based on clients calendar which was exactly provided as a Key figure with fiscal period restriction on the BW side so the BO persons can write an formula to get only the fiscal period for is not null KF.but reulsting CORBA error becuse of time out of the report in Webi Scheduling.
Thanks,
Dinya.