How To Fix CLB654 - Unable to retrieve SAML2 assertion that can be sent to target

SAP Error Message - Details

• Message type: E = Error

• Message class: CLB - SAIL: Common messages

• Message number: 654

• Message text: Unable to retrieve SAML2 assertion that can be sent to target

What causes this issue?

A method requires an SAML assertion be sent to the service provider.
This assertion could not be retrieved from the system.

System Response

The method in progress will be cancelled.

How to fix this error?

Check the Customizing in the backend system for the SAML setup. A
starting point would be the transaction
<DS:TRAN.SAML2>SAML2</>.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CLB654 - Unable to retrieve SAML2 assertion that can be sent to target ?

  The SAP error message CLB654: Unable to retrieve SAML2 assertion that can be sent to target typically occurs in the context of Single Sign-On (SSO) configurations using SAML (Security Assertion Markup Language) in SAP systems. This error indicates that the system is unable to generate or retrieve a valid SAML assertion that is required for authenticating a user to a target system.
  Causes:
  
  
  Configuration Issues: Incorrect configuration of the SAML 2.0 settings in the Identity Provider (IdP) or Service Provider (SP) can lead to this error. This includes misconfigured endpoints, certificates, or metadata.
  
  
  Missing or Invalid Certificates: The certificates used for signing or encrypting SAML assertions may be missing, expired, or invalid.
  
  
  User Mapping Issues: The user may not be properly mapped between the IdP and SP, leading to issues in generating the assertion.
  
  
  Network Issues: Connectivity problems between the SAP system and the IdP can prevent the retrieval of the SAML assertion.
  
  
  Authorization Issues: The user may not have the necessary authorizations to access the target system, which can prevent the generation of a valid assertion.
  
  
  Solutions:
  
  
  Check Configuration: Review the SAML configuration settings in both the IdP and SP. Ensure that the endpoints, certificates, and metadata are correctly configured.
  
  
  Validate Certificates: Ensure that the certificates used for signing and encryption are valid and not expired. If necessary, update the certificates in both the IdP and SP.
  
  
  User Mapping: Verify that the user is correctly mapped in the IdP and that the attributes required for the SAML assertion are correctly configured.
  
  
  Network Connectivity: Check for any network issues that may be preventing communication between the SAP system and the IdP. Ensure that firewalls or proxies are not blocking the necessary traffic.
  
  
  Authorization Check: Ensure that the user has the necessary authorizations to access the target system. Review the roles and permissions assigned to the user.
  
  
  Logs and Traces: Check the logs in both the SAP system and the IdP for any additional error messages or warnings that can provide more context about the issue.
  
  
  Testing with SAML Tracer: Use tools like SAML Tracer (a browser extension) to capture and analyze the SAML requests and responses. This can help identify where the process is failing.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to SAML and SSO for any known issues or patches that may address this error.
  Documentation: Review the official SAP documentation on configuring SAML 2.0 for detailed guidance on setup and troubleshooting.
  Community Forums: Engage with SAP community forums or support channels for additional insights and shared experiences from other users facing similar issues.
  
  By following these steps, you should be able to diagnose and resolve the CLB654 error in your SAP environment.