SAP Message AA655 - SYST: Error when caclulating fiscal period --> F1

Diagnosis
An error occurred while determining the fiscal period &V1& in periodversion &V2&.

Procedure
There are three things which could lead to this error:
The period version &V2& allocated to the company code has not beencreated. In this case, you should create the period version.
The period version has been created, however the allocation of calendardates to the fiscal periods has not been correctly performed or inparticular with calendar-dependent period versions has not beencompletely performed. Check whether the date entered &V1& for periodversion &V2& has been maintained and enter the missing period.
The calendar date &V1& is invalid. This is a system error. Contact yourSystems Specialist.

62179 AF002 or AA655 during simulation in the future
52011Error in period determination