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

XT665 - Overview

• 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