How To Fix 1S420 - Error reading own certificate

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 420

• Message text: Error reading own certificate

What causes this issue?

Cannot read the PSE's own certificate.

System Response

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

How to fix this error?

Check the PSE and the system settings. If necessary, generate a new
PSE. Note that doing so deletes the old key.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 1S420 - Error reading own certificate ?

  The SAP error message 1S420: Error reading own certificate typically indicates an issue with the digital certificate used for secure communication in SAP systems. This error can occur in various contexts, such as when trying to establish a secure connection (e.g., HTTPS, SSL) or when using certain functionalities that require certificate validation.
  Causes:
  
  Missing Certificate: The required certificate may not be installed in the SAP system.
  Corrupted Certificate: The certificate file may be corrupted or improperly formatted.
  Incorrect Configuration: The system may not be configured correctly to access the certificate.
  Expired Certificate: The certificate may have expired and needs to be renewed.
  Access Permissions: The user or the system may not have the necessary permissions to read the certificate file.
  Path Issues: The path to the certificate may be incorrect or the certificate may not be in the expected location.
  
  Solutions:
  
  
  Check Certificate Installation:
  
  Ensure that the required certificate is installed in the SAP system. You can check this in transaction STRUST (Trust Manager).
  If the certificate is missing, you may need to import it.
  
  
  
  Verify Certificate Validity:
  
  Check if the certificate is valid and not expired. If it is expired, you will need to renew it.
  
  
  
  Check Configuration:
  
  Review the configuration settings in transaction STRUST to ensure that the system is correctly set up to use the certificate.
  Ensure that the SSL settings are correctly configured in the instance profile.
  
  
  
  Permissions:
  
  Verify that the user or the system has the necessary permissions to access the certificate file. Check file system permissions if applicable.
  
  
  
  Correct Path:
  
  Ensure that the path to the certificate is correct. If the certificate is stored in a specific directory, make sure that the SAP system can access it.
  
  
  
  Re-import Certificate:
  
  If the certificate appears to be corrupted, you may need to re-import it. Make sure to follow the correct procedure for importing certificates.
  
  
  
  Check Logs:
  
  Review the system logs (transaction SM21) for any additional error messages that may provide more context about the issue.
  
  
  
  Related Information:
  
  Transaction STRUST: This transaction is used to manage SSL certificates and trust relationships in SAP systems.
  SAP Notes: Check for relevant SAP Notes that may address specific issues related to certificate management and error 1S420.
  Documentation: Refer to SAP documentation on SSL configuration and certificate management for detailed steps and best practices.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.