How To Fix FRE642 - RFC Communication Failure: '&1'

FRE642 - Overview

• Message type: E = Error

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

• Message number: 642

• Message text: RFC Communication 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 FRE642 - RFC Communication Failure: '&1' ?

  The SAP error message FRE642 indicates an RFC (Remote Function Call) communication failure. This error typically occurs when there is an issue with the connection between the SAP system and another system (which could be another SAP system or a non-SAP system). The message will often include additional details in the placeholder '&1', which can provide more context about the specific nature of the failure.
  Causes of FRE642 RFC Communication Failure
  
  
  Network Issues: Problems with the network connection, such as downtime, latency, or misconfigured network settings, can lead to RFC communication failures.
  
  
  Configuration Errors: Incorrect settings in the RFC destination (transaction code SM59) can cause communication issues. This includes incorrect hostnames, IP addresses, or port numbers.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to access the target system.
  
  
  System Availability: The target system may be down or not reachable due to maintenance or other issues.
  
  
  Firewall Restrictions: