How To Fix WSS255 - Could not create Secure Conversaton endpoints

SAP Error Message - Details

• Message type: E = Error

• Message class: WSS - Web Services Security

• Message number: 255

• Message text: Could not create Secure Conversaton endpoints

Self-Explanatory Message

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• What is the cause and solution for SAP error message WSS255 - Could not create Secure Conversaton endpoints ?

  SAP Error Message:
  
  WSS255: Could not create Secure Conversation endpoints
  
  Cause
  The error WSS255 typically occurs in SAP systems when the Web Services Security (WSS) infrastructure fails to create Secure Conversation endpoints. Secure Conversation is a WS-Security protocol feature used to establish a secure session between a client and a service, improving performance by avoiding repeated security token exchanges.
  Common causes include:
  
  Incorrect or missing configuration of Secure Conversation in the SAP Web Service runtime.
  Issues with the SSL/TLS setup, such as missing or invalid certificates.
  Problems with the SAP Web Dispatcher or ICM (Internet Communication Manager) configuration.
  Incompatible or missing patches/notes related to WS-Security or Secure Conversation.
  Port conflicts or network issues preventing the creation of endpoints.
  Insufficient system resources or permissions to create the endpoints.
  
  
  Solution
  To resolve the WSS255 error, consider the following steps:
  
  
  Check Secure Conversation Configuration:
  
  Verify that Secure Conversation is enabled and properly configured in the SAP Web Service runtime.
  Use transaction SOAMANAGER to review the Web Service configuration.
  Ensure that the Secure Conversation policy is correctly assigned.
  
  
  
  Verify SSL/TLS Certificates:
  
  Check that the SSL certificates used for the service are valid, not expired, and correctly imported into the SAP system.
  Use transaction STRUST to manage and verify certificates.
  Ensure the certificate chain is complete and trusted.
  
  
  
  Review ICM and Web Dispatcher Settings:
  
  Check the ICM configuration (transaction SMICM) for any errors or misconfigurations.
  If using SAP Web Dispatcher, verify its configuration and logs for related errors.
  
  
  
  Apply Relevant SAP Notes and Patches:
  
  Search the SAP Support Portal for notes related to WSS255 or Secure Conversation issues.
  Apply any recommended patches or corrections.
  
  
  
  Check System Resources and Permissions:
  
  Ensure the SAP system has sufficient resources (memory, ports).
  Verify that the user under which the SAP system runs has the necessary permissions.
  
  
  
  Restart Services:
  
  After configuration changes, restart the ICM or the entire SAP system to apply changes.
  
  
  
  Enable Detailed Logging:
  
  Increase the logging level for WS-Security or Secure Conversation to get more detailed error messages.
  Analyze logs to pinpoint the exact failure cause.
  
  
  
  
  Related Information
  
  
  SAP Transactions:
  
  SOAMANAGER – Web Service configuration and policy management.
  STRUST – Certificate and SSL management.
  SMICM – Internet Communication Manager monitoring.
  SICF – Internet services configuration.
  
  
  
  SAP Notes:
  
  Search for notes with keywords like "WSS255", "Secure Conversation", "WS-Security".
  Example notes might address known bugs or configuration guides.
  
  
  
  Documentation:
  
  SAP Help Portal sections on WS-Security and Secure Conversation.
  SAP Web Services Security Guide.
  
  
  
  General WS-Security Concepts:
  
  Secure Conversation is part of WS-Security to optimize security token usage.
  Proper setup requires matching client and server policies.
  
  
  
  
  If the problem persists after these steps, consider raising a support ticket with SAP, providing detailed logs and system information.