How To Fix SAPC_MESSAGE023 - Connection Type TCP do not allowed WebSocket subprotocol !

SAP Error Message - Details

• Message type: E = Error

• Message class: SAPC_MESSAGE -

• Message number: 023

• Message text: Connection Type TCP do not allowed WebSocket subprotocol !

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 SAPC_MESSAGE023 - Connection Type TCP do not allowed WebSocket subprotocol ! ?

  The error message "SAPC_MESSAGE023 Connection Type TCP do not allowed WebSocket subprotocol" typically indicates that there is an issue with the configuration of the connection type being used in an SAP environment, particularly when dealing with WebSocket connections.
  Cause:
  
  
  Connection Type Mismatch: The error suggests that a TCP connection type is being used where a WebSocket subprotocol is expected. WebSockets are a different protocol that allows for full-duplex communication channels over a single TCP connection, and they require specific handling that is not compatible with standard TCP connections.
  
  
  Configuration Issues: This could be due to incorrect settings in the SAP system or the application that is trying to establish the WebSocket connection. The system may not be configured to support WebSocket connections properly.
  
  
  Version Compatibility: The version of the SAP system or the libraries being used may not support WebSocket connections, or there may be a mismatch between the client and server capabilities.
  
  
  Solution:
  
  
  Check Configuration: Review the configuration settings for the connection type in your SAP system. Ensure that the connection is set up to support WebSocket connections if that is the intended use.
  
  
  Use Correct Protocol: If you are trying to establish a WebSocket connection, ensure that the client is configured to use the WebSocket protocol and not a standard TCP connection. This may involve changing the connection settings in your application or middleware.
  
  
  Update SAP Components: Ensure that your SAP system and any related components are up to date. Sometimes, newer versions include support for additional protocols or fix bugs related to connection handling.
  
  
  Consult Documentation: Refer to the official SAP documentation for guidance on setting up WebSocket connections. This may provide specific instructions or requirements that need to be met.
  
  
  Check Network Settings: Ensure that there are no network issues or firewalls blocking WebSocket connections. WebSockets typically use port 80 (HTTP) or 443 (HTTPS), so ensure these ports are open and properly configured.
  
  
  Testing: After making changes, test the connection again to see if the issue persists. Use tools like browser developer tools or network monitoring tools to diagnose connection attempts.
  
  
  Related Information:
  
  
  WebSocket Protocol: Understand the WebSocket protocol and how it differs from standard TCP connections. WebSockets are designed for real-time communication and require specific handling in both the client and server.
  
  
  SAP Notes and Community: Check SAP Notes or the SAP Community for similar issues and solutions. Other users may have encountered the same problem and shared their solutions.
  
  
  Logs and Traces: Review logs and traces in the SAP system to gather more information about the error. This can provide insights into what might be going wrong during the connection attempt.
  
  
  By following these steps, you should be able to diagnose and resolve the issue related to the SAPC_MESSAGE023 error.