How To Fix SAPC_MESSAGE022 - Application &1 require WebSocket subprotocol &2 !

SAP Error Message - Details

• Message type: E = Error

• Message class: SAPC_MESSAGE -

• Message number: 022

• Message text: Application &1 require WebSocket subprotocol &2 !

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SAPC_MESSAGE022 - Application &1 require WebSocket subprotocol &2 ! ?

  The SAP error message SAPC_MESSAGE022 indicates that a specific application (denoted by &1) requires a WebSocket subprotocol (denoted by &2) that is not being provided or is not supported in the current context. This error typically arises in scenarios where WebSocket communication is being used, such as in SAP Fiori applications or other web-based SAP solutions that rely on real-time data exchange.
  Cause:
  
  Missing Subprotocol: The WebSocket connection is being established without the required subprotocol that the application expects.
  Configuration Issues: The server or client may not be configured correctly to support the required WebSocket subprotocol.
  Version Mismatch: There may be a mismatch between the versions of the client and server, leading to unsupported subprotocols.
  Network Issues: Firewalls or proxies may be interfering with WebSocket connections, preventing the correct subprotocol from being negotiated.
  
  Solution:
  
  Check Application Requirements: Verify the documentation for the application to determine the required WebSocket subprotocol. Ensure that the client is attempting to connect with the correct subprotocol.
  Update Configuration: If you have access to the server or application configuration, ensure that it is set up to support the required WebSocket subprotocol. This may involve updating server settings or application configurations.
  Client-Side Adjustments: If you are developing or configuring the client-side application, ensure that the WebSocket connection is being established with the correct subprotocol. This may involve modifying the connection code to specify the required subprotocol.
  Network Configuration: Check for any network devices (like firewalls or proxies) that may be blocking or altering WebSocket connections. Ensure that they are configured to allow WebSocket traffic.
  Update Software: Ensure that both the client and server software are up to date. Sometimes, newer versions may support additional subprotocols or fix bugs related to WebSocket communication.
  
  Related Information:
  
  WebSocket Protocol: WebSockets are a protocol for full-duplex communication channels over a single TCP connection, commonly used in real-time web applications.
  SAP Fiori: Many SAP Fiori applications utilize WebSockets for real-time data updates. Understanding the specific requirements of the Fiori application in use can help in troubleshooting.
  SAP Notes and Documentation: Check SAP Notes or the official SAP documentation for any known issues or updates related to WebSocket communication and the specific application you are using.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.