How To Fix S1561 - Aggregation has been started; wait a short time and reenter ST03

SAP Error Message - Details

• Message type: E = Error

• Message class: S1 - Statistik / SAP-Monitor

• Message number: 561

• Message text: Aggregation has been started; wait a short time and reenter ST03

What causes this issue?

You requested a refresh of today's workload data. NOTE: Workload data
will always be refreshed with data from the last full hour. You will
never see data from the current hour.

System Response

The required aggregation of statistical data has been started in
parallel for all instances.

How to fix this error?

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

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message S1561 - Aggregation has been started; wait a short time and reenter ST03 ?

  The SAP error message S1561 indicates that the aggregation process for workload data in transaction ST03 (Workload Analysis) has been initiated, and the user is advised to wait for a short period before trying to access the transaction again. This message typically occurs when the system is busy processing workload data, which can happen during peak times or when the system is under heavy load.
  Cause:
  
  Ongoing Aggregation Process: The aggregation of workload data is a background process that compiles and summarizes performance data. If this process is currently running, it can prevent users from accessing the ST03 transaction.
  High System Load: If the system is experiencing high load or resource contention, it may take longer for the aggregation process to complete.
  Frequent Access: If multiple users are trying to access ST03 simultaneously, it can lead to contention for the aggregation process.
  
  Solution:
  
  Wait and Retry: The simplest solution is to wait for a few minutes and then try accessing ST03 again. The aggregation process should complete shortly.
  Check Background Jobs: If the issue persists, check the background jobs in transaction SM37 to see if there are any long-running jobs related to workload aggregation. If necessary, you can monitor or terminate these jobs.
  System Performance: If the system is under heavy load, consider optimizing performance by checking for any resource bottlenecks (CPU, memory, I/O) and addressing them.
  Schedule Aggregation: If this issue occurs frequently, consider scheduling the aggregation process during off-peak hours to minimize user impact.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional guidance related to ST03 and workload aggregation.
  
  Related Information:
  
  Transaction ST03: This transaction is used for workload analysis in SAP, allowing users to analyze system performance, user activity, and transaction statistics.
  Transaction SM37: This transaction is used to monitor background jobs in SAP, where you can check the status of jobs related to workload aggregation.
  SAP Basis Administration: Understanding the role of SAP Basis administrators can be helpful, as they manage system performance and can provide insights into optimizing workload processing.
  
  If the problem continues after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.