How To Fix /SAPAPO/CTM1809 - Error in server selection. All servers used

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/CTM1 -

• Message number: 809

• Message text: Error in server selection. All servers used

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/CTM1809 - Error in server selection. All servers used ?

  The SAP error message /SAPAPO/CTM1809 indicates that there is an issue with server selection in the SAP Advanced Planning and Optimization (APO) system, specifically in the context of the Capable-to-Match (CTM) planning process. The message "Error in server selection. All servers used" suggests that the system is unable to find an available server to process the request, as all configured servers are currently in use or unavailable.
  Causes:
  
  All Servers Busy: All the servers configured for the CTM process are currently busy processing other requests.
  Server Configuration Issues: There may be issues with the configuration of the servers in the system, such as incorrect settings or inactive servers.
  Resource Limitations: The system may be hitting resource limits, such as memory or processing power, which prevents new requests from being processed.
  Network Issues: There could be network connectivity issues that prevent the system from communicating with the servers.
  Locking Issues: There may be locks on the resources that prevent the CTM process from being executed.
  
  Solutions:
  
  Check Server Status: Verify the status of the servers configured for CTM. Ensure that they are active and not overloaded with other processes.
  Monitor System Load: Use transaction codes like SM37 to monitor background jobs and check if there are any long-running jobs that are consuming server resources.
  Adjust Server Configuration: If necessary, adjust the configuration of the servers to ensure that they can handle the expected load. This may involve adding more servers or optimizing existing ones.
  Increase Resources: If the system is consistently hitting resource limits, consider increasing the hardware resources (CPU, memory) allocated to the servers.
  Review Locks: Check for any locks that may be preventing the CTM process from executing. Use transaction SM12 to view and manage locks.
  Retry the Process: Sometimes, simply retrying the process after a short wait can resolve the issue if it was caused by temporary server overload.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM37 (Job Monitoring), SM12 (Lock Entries), and SM21 (System Log) to diagnose issues.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  System Logs: Review system logs for any additional error messages or warnings that may provide more context about the issue.
  Performance Monitoring: Implement performance monitoring tools to keep track of server load and performance metrics to prevent future occurrences.
  
  If the issue persists 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.