How To Fix FRE643 - RFC System Failure: '&1'

SAP Error Message - Details

• Message type: E = Error

• Message class: FRE - F&R CON R/3 - Messages

• Message number: 643

• Message text: RFC System Failure: '&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.

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

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message FRE643 - RFC System Failure: '&1' ?

  The SAP error message FRE643, which indicates an "RFC System Failure: '&1'", typically points to an issue with the Remote Function Call (RFC) communication between SAP systems or between an SAP system and an external system. This error can arise due to various reasons, including network issues, configuration problems, or system resource limitations.
  Causes:
  
  Network Issues: Problems with the network connection between the systems can lead to RFC failures.
  Configuration Errors: Incorrect settings in the RFC destination or in the SAP system configuration can cause this error.
  System Resource Limitations: Insufficient memory, CPU, or other system resources can lead to failures in processing RFC calls.
  Authorization Issues: The user or system may not have the necessary authorizations to perform the requested RFC operation.
  System Downtime: The target system may be down or not reachable due to maintenance or other issues.
  Version Incompatibility: Mismatched versions of SAP systems can lead to communication issues.
  
  Solutions:
  
  Check Network Connectivity: Ensure that there is a stable network connection between the systems involved. 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. Ensure that the settings (such as the target host, system number, and client) are correct.
  Monitor System Resources: Use transaction SM50 or SM66 to monitor system performance and check for any resource bottlenecks. If necessary, increase the resources allocated to the SAP system.
  Check Authorizations: Verify that the user or system has the necessary authorizations to execute the RFC call. You can use transaction SU53 to analyze authorization issues.
  Check System Status: Ensure that the target system is up and running. You can check the system status in transaction SM51 or by trying to log in to the target system.
  Review Logs: Check the system logs (transaction SM21) and the developer trace files (transaction ST11) for any additional error messages or clues related to the RFC failure.
  Update SAP Notes: Check for any relevant SAP Notes that may address known issues related to RFC failures. You can search for notes in the SAP Support Portal.
  
  Related Information:
  
  Transaction Codes: 
  
  SM59 - RFC Destinations
  SM50 - Process Overview
  SM66 - Global Process Overview
  SM21 - System Log
  ST11 - Developer Traces
  SU53 - Authorization Check
  
  
  SAP Support: If the issue persists after trying the above solutions, consider reaching out to SAP Support for further assistance, providing them with detailed information about the error and the steps you have already taken.
  
  By following these steps, you should be able to diagnose and resolve the FRE643 RFC System Failure error in your SAP environment.