How To Fix WEBFI_MASTER353 - Problems occurred with communication with the JCO RFC server

SAP Error Message - Details

• Message type: E = Error

• Message class: WEBFI_MASTER - Web Financials: Business Partner Master Data

• Message number: 353

• Message text: Problems occurred with communication with the JCO RFC server

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WEBFI_MASTER353 - Problems occurred with communication with the JCO RFC server ?

  The SAP error message WEBFI_MASTER353: Problems occurred with communication with the JCO RFC server indicates that there is a communication problem between the SAP system (or a related component) and the JCo (Java Connector) RFC server. This typically happens in scenarios where SAP Java-based components or external Java applications communicate with SAP systems via the JCo RFC interface.
  
  Cause
  
  
  JCo RFC Server Not Running or Unreachable
  
  The JCo RFC server (Java application acting as an RFC server) is not started, crashed, or is unreachable due to network issues.
  
  
  Incorrect Connection Parameters
  
  The connection parameters (host, port, program ID, etc.) configured in SAP or the Java application are incorrect or mismatched.
  
  
  Firewall or Network Issues
  
  Firewalls or network restrictions block the communication between the SAP system and the JCo RFC server.
  
  
  Version or Compatibility Issues
  
  The JCo library version used by the Java application is incompatible with the SAP system or the Java runtime environment.
  
  
  Resource or Performance Issues
  
  The JCo RFC server is overloaded, causing timeouts or dropped connections.
  
  
  Security or Authorization Problems
  
  The user or system trying to connect via JCo does not have the required authorizations or credentials.
  
  
  
  Solution
  
  
  Check JCo RFC Server Status  
  
  Verify that the Java application acting as the JCo RFC server is running and listening on the expected port.
  Restart the JCo RFC server if necessary.
  
  
  
  Verify Connection Parameters  
  
  Check the connection parameters in the SAP system (SM59 for RFC destinations) or in the Java application configuration.
  Ensure the program ID, gateway host, gateway service, and other parameters match on both sides.
  
  
  
  Network and Firewall Checks  
  
  Ensure that the network allows communication on the required ports.
  Check firewall rules and open necessary ports.
  
  
  
  Check Logs for Detailed Errors  
  
  Review the SAP system logs (transaction SM21, ST22) and the Java application logs for more detailed error messages.
  
  
  
  Update JCo Libraries  
  
  Ensure that the JCo libraries used are compatible with the SAP system version.
  Update to the latest supported JCo version if needed.
  
  
  
  Check Authorizations  
  
  Verify that the user used for the RFC connection has the necessary authorizations.
  Check for any security policies that might block the connection.
  
  
  
  Performance and Resource Monitoring  
  
  Monitor the JCo RFC server for resource usage.
  Increase resources or optimize the Java application if overloaded.
  
  
  
  
  Related Information
  
  SAP Java Connector (JCo): A middleware component that enables communication between SAP systems and Java applications via RFC.
  Transaction SM59: Used to configure and test RFC destinations in SAP.
  SAP Notes: Search SAP Support Portal for notes related to JCo RFC communication issues.
  Common JCo RFC Errors: Timeouts, connection refused, program ID not registered, etc.
  SAP Gateway: The gateway service must be running and reachable for RFC communication.
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WEBFI_MASTER353: Problems with communication with the JCo RFC server
  
  
  Cause
  JCo RFC server down, incorrect parameters, network/firewall issues, version mismatch
  
  
  Solution
  Check server status, verify parameters, fix network/firewall, update JCo, check authorizations
  
  
  Tools
  SM59 (RFC destinations), SM21/ST22 (logs), Java application logs
  
  
  Related Info
  SAP Java Connector (JCo), SAP Gateway, SAP Notes on JCo communication
  
  
  
  
  If you provide more context (e.g., system landscape, Java application details, exact scenario), I can help with more specific troubleshooting steps.