How To Fix 1S540 - Certificate response does not match PSE


1S540 - Overview

  • Message type: E = Error

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

  • Message number: 540

  • Message text: Certificate response does not match PSE

  • Show details Hide details
  • What causes this issue?

    The public key of the certificate response does not match the PSE. There
    are two possible reasons for this happening. Either you created the
    certificate request from another PSE. Or you have regenerated the PSE
    after creating the certificate request (in Trust Manager: choose
    Generate PSE or Replace PSE). Even if you regenerate a PSE with the same
    subject name, you generate new cryptographic keys, that is a certificate
    response that would match the old PSE does not match the new PSE.

    System Response

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

    How to fix this error?

    Select the correct PSE to import the certificate response. If you have
    regenerated the PSE after generating the certificate request, you need
    to generate a new certificate request, and therefore request a new
    certificate from the CA.

    Procedure for System Administrators


    Error message extract from SAP system. Copyright SAP SE.


Smart SAP Assistant

  • What is the cause and solution for SAP error message 1S540 - Certificate response does not match PSE ?
    The SAP error message 1S540: Certificate response does not match PSE typically occurs in the context of Secure Network Communications (SNC) when there is a mismatch between the certificate presented by the server and the Personal Security Environment (PSE) configured in the SAP system. This can happen during secure communications, such as when establishing a connection to an external system or service.
    Causes:
    
    Mismatched Certificates: The certificate presented by the server does not match the expected certificate in the PSE.
    Expired Certificates: The certificate in the PSE may have expired or been revoked.
    Incorrect PSE Configuration: The PSE may not be correctly configured or may not contain the necessary certificates.
    Network Issues: There may be network issues that prevent the proper exchange of certificates.
    Changes in the Certificate Authority (CA): If the CA that issued the certificates has changed or if the root certificate is not trusted, this error can occur.
    
    Solutions:
    
    Verify Certificates: Check the certificates in

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