How To Fix 1S550 - Instance PSE of system PKI not found

SAP Error Message - Details

• Message type: E = Error

• Message class: 1S - Messages for SSF ("Secure Store & Forward")

• Message number: 550

• Message text: Instance PSE of system PKI not found

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message 1S550 - Instance PSE of system PKI not found ?

  The SAP error message "1S550 Instance PSE of system PKI not found" typically indicates that the system is unable to locate the Personal Security Environment (PSE) for the Public Key Infrastructure (PKI) instance. This can occur in various scenarios, particularly when dealing with secure communications, digital signatures, or encryption within SAP systems.
  Cause:
  
  Missing PSE Files: The PSE files may not exist in the expected directory.
  Incorrect Configuration: The system may not be correctly configured to point to the PSE files.
  File Permissions: The user or service account running the SAP instance may not have the necessary permissions to access the PSE files.
  Corrupted PSE: The PSE files may be corrupted or improperly generated.
  System Instance Issues: The instance itself may not be properly set up or may be misconfigured.
  
  Solution:
  
  
  Check PSE Files:
  
  Verify that the PSE files exist in the expected directory. The default location is usually in the sec directory of the SAP instance (e.g., /usr/sap/<SID>/SYS/global/security/pse).
  If the files are missing, you may need to create a new PSE.
  
  
  
  Create/Regenerate PSE:
  
  Use the transaction code STRUST to manage the PSE. You can create or regenerate the PSE from this transaction.
  Follow the prompts to create a new PSE for the PKI instance.
  
  
  
  Check Configuration:
  
  Ensure that the system is correctly configured to use the PSE. This includes checking the instance profile and ensuring that the parameters related to PKI and security are correctly set.
  
  
  
  File Permissions:
  
  Check the file permissions of the PSE files and ensure that the SAP instance has the necessary permissions to read and write to these files.
  
  
  
  Review Logs:
  
  Check the SAP system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages that may provide more context about the issue.
  
  
  
  Restart the Instance:
  
  After making changes, restart the SAP instance to ensure that the changes take effect.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  STRUST: Manage PSE and trust relationships.
  SM21: System log.
  ST22: Dump analysis.
  
  
  
  Documentation: Refer to SAP Help documentation for detailed instructions on managing PSE and PKI configurations.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  If the issue persists after following these steps, consider reaching out to SAP support for further assistance.