00142 - Cannot check issuer of SSO ticket

SAP Error Message - Details

• Message type: E = Error

• Message class: 00 -

• Message number: 142

• Message text: Cannot check issuer of SSO ticket

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 00142 - Cannot check issuer of SSO ticket ?

  The SAP error message "00142 Cannot check issuer of SSO ticket" typically occurs in the context of Single Sign-On (SSO) configurations, particularly when using SAP's Secure Network Communications (SNC) or when integrating with external identity providers. This error indicates that the system is unable to verify the issuer of the SSO ticket, which can prevent users from authenticating successfully.
  Causes:
  
  Invalid or Missing Trust Relationship: The SAP system may not have a valid trust relationship with the identity provider (IdP) that issued the SSO ticket.
  Certificate Issues: The public key certificate used to sign the SSO ticket may not be correctly installed or may have expired.
  Configuration Errors: There may be misconfigurations in the SSO settings, such as incorrect URLs or parameters.
  Network Issues: Connectivity problems between the SAP system and the IdP can also lead to this error.
  Incorrect SSO Ticket: The SSO ticket itself may be malformed or not properly generated.
  
  Solutions:
  
  
  Check Trust Configuration:
  
  Ensure that the SAP system trusts the IdP that issues the SSO tickets. This may involve importing the IdP's public key certificate into the SAP system.
  Use transaction STRUST in SAP to manage and verify the SSL certificates.
  
  
  
  Verify Certificates:
  
  Check the validity of the certificates used for SSO. Ensure that they are not expired and are correctly configured.
  If necessary, update or replace the certificates.
  
  
  
  Review SSO Configuration:
  
  Go through the SSO configuration settings in the SAP system. Ensure that all parameters, such as the issuer URL and audience, are correctly set.
  If using SAP NetWeaver, check the settings in the SAML 2.0 configuration.
  
  
  
  Test Connectivity:
  
  Ensure that there are no network issues preventing the SAP system from reaching the IdP. This can include checking firewalls, proxies, and network routes.
  
  
  
  Check Logs:
  
  Review the SAP system logs (transaction SM21) and the application logs (transaction SLG1) for more detailed error messages that can provide additional context.
  
  
  
  Consult Documentation:
  
  Refer to SAP's official documentation for SSO and SNC configurations to ensure that all steps have been followed correctly.
  
  
  
  Contact Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide updates and patches.
  Documentation: Review the SAP Help Portal for detailed guides on configuring SSO and troubleshooting related issues.
  Community Forums: Engage with the SAP Community for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the "00142 Cannot check issuer of SSO ticket" error in your SAP environment.