How To Fix SRT_CORE020 - Unsupported session mode selected

SAP Error Message - Details

• Message type: E = Error

• Message class: SRT_CORE - Nachrichtenklasse für SOAP Runtime

• Message number: 020

• Message text: Unsupported session mode selected

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?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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 SRT_CORE020 - Unsupported session mode selected ?

  The SAP error message SRT_CORE020: Unsupported session mode selected typically occurs in the context of SAP's web services and integration scenarios, particularly when using the SAP Process Integration (PI) or SAP Process Orchestration (PO) systems. This error indicates that there is a mismatch or an unsupported configuration regarding the session mode being used in a web service call.
  Cause:
  
  
  Session Mode Configuration: The error usually arises when the session mode specified in the web service configuration does not match the expected or supported session modes by the SAP system. Common session modes include "None," "RequestResponse," and "Session."
  
  
  Web Service Consumer/Provider Mismatch: If the web service consumer (client) and provider (server) have different expectations regarding session handling, this error can occur. For example, if the consumer is trying to use a session mode that the provider does not support.
  
  
  Incorrect WSDL or Service Definition: If the WSDL (Web Services Description Language) file or service definition is incorrectly configured or does not align with the expected session modes, it can lead to this error.
  
  
  Solution:
  
  
  Check Session Mode Configuration: Review the session mode settings in both the consumer and provider configurations. Ensure that they are compatible and that the session mode being used is supported by both ends.
  
  
  Update WSDL/Service Definition: If there are discrepancies in the WSDL or service definitions, update them to ensure they correctly reflect the intended session modes. Regenerate the WSDL if necessary.
  
  
  Adjust Integration Configuration: In SAP PI/PO, check the integration flow (iFlow) or configuration settings to ensure that the session mode is set correctly. You may need to modify the integration scenario to align with the supported session modes.
  
  
  Consult Documentation: Refer to SAP documentation for the specific version you are using to understand the supported session modes and any limitations or requirements.
  
  
  Testing: After making changes, test the web service call again to ensure that the error is resolved.
  
  
  Related Information:
  
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common problems.
  
  
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  
  
  Logs and Traces: Review the application logs and traces in SAP PI/PO to gather more context about the error, which can help in diagnosing the issue more effectively.
  
  
  By following these steps, you should be able to identify the cause of the SRT_CORE020 error and implement a suitable solution.