How To Fix S_UCON_LM250 - UCON WebSocket RFC not active

SAP Error Message - Details

• Message type: E = Error

• Message class: S_UCON_LM - Messages for Unified Connectivity LM process

• Message number: 250

• Message text: UCON WebSocket RFC not active

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message S_UCON_LM250 - UCON WebSocket RFC not active ?

  The SAP error message S_UCON_LM250 indicates that the UCON (User Connection) WebSocket RFC (Remote Function Call) is not active. This error typically arises in the context of SAP systems that utilize WebSocket connections for real-time communication, such as in SAP Fiori applications or other web-based interfaces.
  Cause:
  The error can occur due to several reasons:
  
  UCON Configuration: The UCON WebSocket RFC might not be properly configured or activated in the SAP system.
  Service Activation: The necessary services for UCON WebSocket might not be activated in the SAP Gateway or the relevant backend system.
  Network Issues: There could be network-related issues preventing the WebSocket connection from being established.
  Authorization Issues: The user might not have the necessary authorizations to access the UCON WebSocket service.
  
  Solution:
  To resolve the error, you can follow these steps:
  
  
  Check UCON Configuration:
  
  Go to transaction SICF and check if the UCON WebSocket service is active. Look for the service path related to UCON and ensure it is activated.
  If it is not active, activate it by right-clicking on the service and selecting "Activate Service".
  
  
  
  Check Service Activation:
  
  Ensure that the necessary services for UCON WebSocket are activated in the SAP Gateway. This can also be done in transaction SICF.
  Look for services like /sap/bc/ucon or similar, depending on your specific configuration.
  
  
  
  Check Network Configuration:
  
  Ensure that there are no firewall or network issues that could be blocking WebSocket connections. Verify that the ports used for WebSocket communication are open and accessible.
  
  
  
  Review Authorizations:
  
  Check the user roles and authorizations to ensure that the user has the necessary permissions to access the UCON WebSocket service. You can use transaction SU53 to analyze authorization failures.
  
  
  
  Check Logs:
  
  Review the system logs (transaction SM21) and the application logs (transaction SLG1) for any additional error messages or warnings that could provide more context about the issue.
  
  
  
  Restart Services:
  
  If changes were made to the configuration, consider restarting the relevant services or the SAP system to ensure that all changes take effect.
  
  
  
  Related Information:
  
  Documentation: Refer to the official SAP documentation for UCON and WebSocket RFC for detailed configuration steps and troubleshooting guidelines.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide additional troubleshooting steps related to UCON WebSocket RFC.
  Community Forums: Engage with SAP community forums or support channels for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the S_UCON_LM250 error effectively.