How To Fix SAML2159 - Unexpected exception during SAML 2.0 processing: '&1'

SAML2159 - Overview

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 159

• Message text: Unexpected exception during SAML 2.0 processing: '&1'

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2159 - Unexpected exception during SAML 2.0 processing: '&1' ?

  The SAP error message SAML2159 indicates that there was an unexpected exception during the processing of a SAML 2.0 request. This error can occur in various scenarios related to Single Sign-On (SSO) configurations using SAML.
  Possible Causes:
  
  
  Configuration Issues: Incorrect configuration of the SAML 2.0 settings in the SAP system or the Identity Provider (IdP).
  Network Issues: Problems with network connectivity between the SAP system and the IdP.
  Certificate Issues: Expired or invalid certificates used for signing or encrypting SAML assertions.
  Malformed SAML Assertions: The SAML assertion received may be malformed or not conforming to the expected structure.
  Version Mismatch: Incompatibility between the SAML versions used by the SAP system and the IdP.
  User Attributes: Missing or incorrect user attributes in the SAML assertion that are required for user provisioning.
  
  Solutions:
  
  Check Configuration: Review the SAML 2.0 configuration in both the SAP system and the IdP. Ensure that all settings, such as endpoints, certificates, and attribute mappings, are correctly