SAP Message S1561 - Aggregation has been started; wait a short time and reenter ST03

Diagnosis
You requested a refresh of today's workload data. NOTE: Workload datawill always be refreshed with data from the last full hour. You willnever see data from the current hour.

System Response
The required aggregation of statistical data has been started inparallel for all instances.

Procedure
Since the aggregation takes place asynchronously and takes some time,wait a minute and go back to reselect todays workload data intransaction ST03.