How To Fix XT665 - RFC error: &1&2&3&4

SAP Error Message - Details

• Message type: E = Error

• Message class: XT - Transport Management System

• Message number: 665

• Message text: RFC error: &1&2&3&4

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message XT665 - RFC error: &1&2&3&4 ?

  The SAP error message XT665, which indicates an RFC (Remote Function Call) error, typically arises when there is an issue with the communication between SAP systems or between an SAP system and an external system. The message format &1&2&3&4 usually contains specific details about the error, such as the function module name, the destination system, or other relevant identifiers.
  Causes of XT665 RFC Error
  
  
  Network Issues: Problems with the network connection between the SAP systems can lead to RFC errors. This could be due to firewalls, routing issues, or network outages.
  
  
  Configuration Errors: Incorrect configuration in the RFC destination settings (transaction SM59) can cause communication failures. This includes incorrect hostnames, ports, or logon credentials.
  
  
  Authorization Issues: The user credentials used for the RFC call may not have the necessary authorizations to execute the function module.
  
  
  System Availability: The target system may be down or not reachable, leading to an inability to establish an RFC connection.
  
  
  Function Module Issues: The function module being called may not exist, may be incorrectly implemented, or may have been deactivated.
  
  
  Solutions to XT665 RFC Error
  
  
  Check Network Connectivity: Ensure that the network connection between the systems is stable. You can use tools like ping or traceroute to diagnose network issues.
  
  
  Review RFC Destination Configuration:
  
  Go to transaction SM59 and check the configuration of the RFC destination.
  Verify the connection parameters, including the target host, service, and logon credentials.
  Test the connection using the "Connection Test" option in SM59.
  
  
  
  Check User Authorizations: Ensure that the user ID used for the RFC call has the necessary authorizations to execute the function module. You can check this in transaction SU01.
  
  
  Verify System Status: Check if the target system is up and running. You can do this by logging into the target system or checking its status in the SAP system monitoring tools.
  
  
  Inspect Function Module: If the error is related to a specific function module, ensure that it is active and correctly implemented. You can check this in transaction SE37 or SE80.
  
  
  Review SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address known issues related to the RFC error.
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SU01: User Maintenance
  SE37: Function Module
  SE80: Object Navigator
  
  
  
  Logs and Traces: You can check the system logs (transaction SM21) and the developer traces (transaction ST11) for more detailed error messages that may provide additional context for the RFC error.
  
  
  SAP Support: If the issue persists after checking the above points, consider reaching out to SAP Support for further assistance, providing them with the full error message and any relevant logs.
  
  
  By following these steps, you should be able to diagnose and resolve the XT665 RFC error in your SAP environment.