How To Fix 3G339 - Communication error for aRFC: &

SAP Error Message - Details

• Message type: E = Error

• Message class: 3G - Payroll: International

• Message number: 339

• Message text: Communication error for aRFC: &

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 3G339 - Communication error for aRFC: & ?

  The SAP error message 3G339 indicates a communication error for an asynchronous Remote Function Call (aRFC). This error typically occurs when there is a problem with the communication between the SAP system and the external system or between different SAP systems. Here are some common causes, potential solutions, and related information for this error:
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system.
  Configuration Errors: Incorrect configuration of the RFC destination in the SAP system can lead to communication errors.
  System Downtime: The target system may be down or not reachable at the time of the call.
  Firewall Restrictions: Firewalls or security settings may be blocking the communication between the systems.
  Incorrect User Credentials: The user credentials used for the RFC connection may be incorrect or not authorized.
  Resource Limitations: The target system may be overloaded or have resource limitations that prevent it from processing the request.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the SAP systems is stable and functioning. You can use tools like ping or traceroute to diagnose network issues.
  Verify RFC Destination: Go to transaction SM59 in the SAP GUI and check the configuration of the RFC destination. Ensure that the connection parameters (such as target host, system number, client, user, and password) are correct.
  Check System Status: Verify that the target system is up and running. You can check the system logs or use transaction SM51 to see the status of the application servers.
  Review Firewall Settings: Ensure that any firewalls between the systems allow traffic on the required ports for RFC communication.
  Test Connection: Use the "Connection Test" feature in transaction SM59 to test the RFC connection. This can help identify if the issue is with the connection itself.
  Check User Authorizations: Ensure that the user used for the RFC connection has the necessary authorizations to perform the required actions on the target system.
  Monitor System Resources: Check the performance and resource usage on the target system to ensure it is not overloaded.
  
  Related Information:
  
  Transaction Codes: 
  
  SM59: RFC Destinations
  SM21: System Log
  SM37: Job Monitoring
  ST22: Dump Analysis
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address specific issues related to aRFC communication errors.
  Logs and Traces: Review the application logs and traces for more detailed error messages that can provide additional context for the communication failure.
  
  If the issue persists after trying the above solutions, it may be beneficial to engage with your SAP Basis team or SAP support for further assistance.