How To Fix PFL_API021 - Parameter switch performed on server &1

SAP Error Message - Details

• Message type: E = Error

• Message class: PFL_API - A1S/CTC-API Error Messages

• Message number: 021

• Message text: Parameter switch performed on server &1

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message PFL_API021 - Parameter switch performed on server &1 ?

  The SAP error message PFL_API021, which states "Parameter switch performed on server &1," typically indicates that a parameter switch has occurred on the specified application server. This can happen for various reasons, often related to system configuration or performance issues.
  Cause:
  
  Parameter Changes: The error may occur if there are changes to the instance profile parameters that require a restart of the application server.
  System Load: High system load or resource constraints may trigger a parameter switch to optimize performance.
  Configuration Issues: Incorrect or conflicting configuration settings in the instance profile can lead to this error.
  Transport of Copies: If a transport of copies is performed, it may inadvertently change parameters that lead to this error.
  
  Solution:
  
  Check Instance Profile: Review the instance profile parameters for the affected server. Ensure that they are correctly set and do not conflict with each other.
  Restart the Server: If parameters have been changed, a restart of the application server may be necessary to apply the changes.
  Monitor System Performance: Use transaction codes like ST03N or ST06 to monitor system performance and identify any bottlenecks that may be causing the parameter switch.
  Review Logs: Check the system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the parameter switch.
  Consult SAP Notes: Look for relevant SAP Notes that may address this specific error or provide guidance on parameter settings.
  Contact SAP Support: If the issue persists and cannot be resolved through the above steps, consider reaching out to SAP support for further assistance.
  
  Related Information:
  
  
  Transaction Codes: 
  
  RZ10: To maintain instance profiles.
  SM21: To view system logs.
  ST03N: To analyze workload and performance.
  ST06: To monitor system resources.
  
  
  
  SAP Notes: Search for SAP Notes related to PFL_API021 for specific guidance or patches that may address the issue.
  
  
  Documentation: Review SAP documentation on parameter management and performance tuning for best practices.
  
  
  By following these steps, you should be able to diagnose and resolve the issue related to the PFL_API021 error message.