How To Fix ESH_INTEGRATION066 - System &2, client &3 could not be reached via RFC destination &1

ESH_INTEGRATION066 - Overview

• Message type: E = Error

• Message class: ESH_INTEGRATION - ESH Integration

• Message number: 066

• Message text: System &2, client &3 could not be reached via RFC destination &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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message ESH_INTEGRATION066 - System &2, client &3 could not be reached via RFC destination &1 ?

  The SAP error message ESH_INTEGRATION066 indicates that the system specified (System &2, client &3) could not be reached via the specified RFC destination (&1). This error typically arises in scenarios where there is an attempt to connect to another SAP system or service using Remote Function Call (RFC) and the connection fails.
  Causes:
  
  
  RFC Destination 
  Configuration Issues: The RFC destination may not be correctly configured in the SAP system. This includes incorrect connection parameters such as the target system's hostname, service name, or system number.
  
  
  Network Issues: There may be network connectivity problems between the two systems. This could be due to firewall settings, network outages, or incorrect routing.
  
  
  Target System Down: The target SAP system may be down or not running, making it impossible to establish a connection.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to access the target system.
  
  
  SAP Gateway Issues: The SAP Gateway