SAP Message 5A468 - No basis for calculation of working time preset

Diagnosis
There is no calculation basis (weekly, monthly, annually) for theworking time set in system table T77S0.

System Response
The system calculates on a monthly basis.

Procedure
Enter a calculation basis in table T77S0 for 'WOKRT' 'PERCK',ine(D=daily W=weekly, M=monthly, Y=annually).

Procedure for System Administration
Enter the calculation base.