1S105 - SSF error: error in the signer list for RFC

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 105

• Message text: SSF error: error in the signer list for RFC

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 1S105 - SSF error: error in the signer list for RFC ?

  The SAP error message 1S105 SSF error: error in the signer list for RFC typically indicates an issue with the Secure Store and Forward (SSF) configuration, particularly related to the digital signatures used in Remote Function Calls (RFC). This error can arise due to several reasons, including misconfiguration of the SSF settings, issues with the cryptographic keys, or problems with the digital certificates.
  Causes:
  
  Invalid or Missing Signer Certificates: The signer list may not contain valid certificates or may be missing entirely.
  Configuration Issues: Incorrect configuration of the SSF settings in the SAP system.
  Expired Certificates: The certificates used for signing may have expired.
  Key Storage Issues: Problems with the key storage or access rights to the key storage.
  Network Issues: Connectivity problems that prevent the system from accessing the necessary signing services.
  
  Solutions:
  
  
  Check SSF Configuration:
  
  Go to transaction SSFC (SSF Configuration) and verify the settings.
  Ensure that the correct SSF library is being used and that the configuration is correct.
  
  
  
  Verify Signer List:
  
  Check the signer list in the SSF configuration. Ensure that all required certificates are present and valid.
  You can use transaction STRUST to manage and check the certificates.
  
  
  
  Update or Renew Certificates:
  
  If any certificates are expired, renew them and update the signer list accordingly.
  
  
  
  Check Key Storage:
  
  Ensure that the key storage is accessible and that the necessary permissions are set for the user or service accessing it.
  
  
  
  Test RFC Connection:
  
  Use transaction SM59 to test the RFC connection. This can help identify if the issue is specific to a particular RFC destination.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the application logs (transaction SLG1) for any additional error messages that might provide more context.
  
  
  
  Consult Documentation:
  
  Refer to SAP Notes related to SSF and RFC for any specific patches or updates that may address known issues.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes that might address specific issues related to SSF and RFC errors.
  Documentation: Review the official SAP documentation on SSF and digital signatures for more detailed guidance.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to diagnose and resolve the SSF error related to the signer list for RFC in your SAP system.