How To Fix SAML2129 - Version mismatch

SAML2129 - Overview

• Message type: E = Error

• Message class: SAML2 - SAML2 Nachrichten

• Message number: 129

• Message text: Version mismatch

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAML2129 - Version mismatch ?

  The SAP error message SAML2129: Version mismatch typically occurs in the context of Single Sign-On (SSO) configurations using SAML (Security Assertion Markup Language). This error indicates that there is a mismatch between the SAML protocol versions being used by the Identity Provider (IdP) and the Service Provider (SP).
  
  Cause:
  
  Version Mismatch: The most common cause is that the IdP is configured to use a different version of SAML than what the SP is expecting. For example, if the IdP is using SAML 2.0 and the SP is configured for SAML 1.1, this error will occur.
  
  Configuration Issues: Incorrect or incomplete configuration settings in either the IdP or SP can lead to this error.
  Metadata Issues: If the metadata exchanged between the IdP and SP is outdated or incorrect, it may lead to version mismatches.
  Library or Framework Issues: If the libraries or frameworks used for SAML processing are outdated or incompatible, they may not support