How To Fix /SDF/S1539 - RFC connection not established to &1. &2

/SDF/S1539 - Overview

• Message type: E = Error

• Message class: /SDF/S1 -

• Message number: 539

• Message text: RFC connection not established to &1. &2

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 /SDF/S1539 - RFC connection not established to &1. &2 ?

  The SAP error message /SDF/S1539 RFC connection not established to &1. &2 typically indicates that there is an issue with the Remote Function Call (RFC) connection to a specified system. The placeholders &1 and &2 will be replaced with the name of the target system and a specific error message or code, respectively.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP systems.
  Configuration Errors: The RFC destination may not be configured correctly in the SAP system.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  Service Availability: The target SAP system may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the required ports for RFC communication.
  SAP Gateway Issues: The SAP Gateway service may not be running on the target system.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the target system is reachable from the source system.
  
  
  
  Verify RFC Destination Configuration:
  
  Go