How To Fix LAW_MESSAGES336 - RFC communication error: &1

SAP Error Message - Details

• Message type: E = Error

• Message class: LAW_MESSAGES - License Administration Workbench

• Message number: 336

• Message text: RFC communication error: &1

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 LAW_MESSAGES336 - RFC communication error: &1 ?

  The SAP error message LAW_MESSAGES336, which indicates an "RFC communication error: &1," typically arises during Remote Function Call (RFC) communication between SAP systems or between an SAP system and an external system. This error can occur due to various reasons, and understanding the cause is essential for troubleshooting.
  Possible Causes:
  
  
  Network Issues: Problems with the network connection between the systems can lead to RFC communication errors. This could include issues like network downtime, firewall restrictions, or incorrect routing.
  
  
  Configuration Errors: Incorrect configuration of the RFC destination in the SAP system can lead to communication failures. This includes incorrect settings in the RFC destination (transaction SM59).
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to perform the requested operation.
  
  
  System Availability: The target system may be down or not reachable due to maintenance or other issues.
  
  
  Timeouts: If the RFC call takes too long to respond, it may time out, leading to this error.
  
  
  Version Compatibility: Incompatibility between different versions of SAP systems can also lead to communication errors.
  
  
  Solutions:
  
  
  Check Network Connectivity: Ensure that there is a stable network connection between the systems. You can use tools like ping or traceroute to diagnose network issues.
  
  
  Verify RFC Destination: Go to transaction SM59 and check the configuration of the RFC destination. Ensure that the connection parameters (like target host, system number, client, user, and password) are correct.
  
  
  Test Connection: In transaction SM59, use the "Test Connection" feature to verify that the RFC destination can be reached successfully.
  
  
  Check Authorizations: Ensure that the user used for the RFC connection has the necessary authorizations to execute the required functions.
  
  
  Monitor System Status: Check the status of the target system to ensure it is up and running. You can also check for any scheduled maintenance that might affect availability.
  
  
  Increase Timeout Settings: If timeouts are an issue, consider increasing the timeout settings in the RFC destination configuration.
  
  
  Review Logs: Check the system logs (transaction SM21) and the application logs (transaction SLG1) for any additional error messages that might provide more context.
  
  
  Consult SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address specific issues related to RFC communication errors.
  
  
  Related Information:
  
  Transaction Codes: 
  
  SM59 - RFC Destinations
  SM21 - System Log
  SLG1 - Application Log
  
  
  SAP Support: If the issue persists, consider reaching out to SAP Support for further assistance, providing them with detailed information about the error and the steps you have already taken to troubleshoot.
  
  By following these steps, you should be able to identify and resolve the cause of the RFC communication error LAW_MESSAGES336.