How To Fix SRT_TRANSIENT_LP004 - Authentication must only be set once

SAP Error Message - Details

• Message type: E = Error

• Message class: SRT_TRANSIENT_LP - Message class for transient logical port

• Message number: 004

• Message text: Authentication must only be set once

Self-Explanatory Message

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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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SRT_TRANSIENT_LP004 - Authentication must only be set once ?

  The SAP error message SRT_TRANSIENT_LP004 with the description "Authentication must only be set once" typically occurs in the context of SAP's web services or when using the SAP Process Integration (PI) or Process Orchestration (PO) systems. This error indicates that there is an issue with the authentication settings being applied multiple times during a service call.
  Cause:
  
  
  Multiple Authentication Settings: The error usually arises when the authentication method is being set more than once in the same context. This can happen if the service consumer or provider is trying to set authentication parameters (like username and password) multiple times during the execution of a web service call.
  
  
  Configuration Issues: There may be misconfigurations in the service consumer or provider settings, leading to the authentication being applied incorrectly.
  
  
  Code Issues: If you are using custom code to call the web service, there might be logic that inadvertently sets the authentication multiple times.
  
  
  Solution:
  
  
  Review Authentication Logic: Check the code or configuration where the authentication is being set. Ensure that the authentication parameters are only set once per service call.
  
  
  Check Service Consumer Configuration: If you are using a service consumer (like an SAP application or a third-party application), verify that the authentication settings are correctly configured and not duplicated.
  
  
  Update Service Definitions: If you are using SAP PI/PO, ensure that the service definitions and communication channels are correctly set up without conflicting authentication settings.
  
  
  Debugging: If you have access to the backend, consider enabling debugging or logging to trace where the authentication is being set multiple times. This can help identify the exact point of failure.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific version you are using, as there may be version-specific nuances or updates that address this issue.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide patches or updates.
  
  
  Related Information:
  
  SAP PI/PO Documentation: Review the official SAP documentation for Process Integration or Process Orchestration for best practices on configuring web services and authentication.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Error Handling: Implement proper error handling in your web service calls to gracefully manage authentication errors and provide meaningful feedback.
  
  By following these steps, you should be able to resolve the SRT_TRANSIENT_LP004 error and ensure that authentication is handled correctly in your SAP environment.