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

SAP Error Message - Details

• 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

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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 service on the target system may not be running or may be misconfigured.
  
  
  Solutions:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the RFC destination (&1) and check its configuration.
  Ensure that the connection type, target host, and service are correctly set.
  
  
  
  Test the RFC Connection:
  
  In transaction SM59, select the RFC destination and use the "Connection Test" option to verify if the connection can be established.
  
  
  
  Check Network Connectivity:
  
  Use tools like ping or telnet to check if the target system is reachable from the source system.
  Ensure that there are no firewall rules blocking the connection.
  
  
  
  Verify Target System Status:
  
  Check if the target SAP system (System &2) is up and running.
  Ensure that the SAP services, including the Gateway, are active.
  
  
  
  Review User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the target system.
  
  
  
  Check SAP Gateway:
  
  Ensure that the SAP Gateway service is running on the target system. You can check this in transaction SMGW.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SMGW: SAP Gateway Monitor
  SICF: Maintain HTTP Services (if applicable)
  
  
  
  Logs and Traces:
  
  Check the system logs (transaction SM21) for any related error messages.
  Use transaction ST22 to check for dumps that might provide more context.
  
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC connections.
  
  
  By following these steps, you should be able to diagnose and resolve the issue related to the ESH_INTEGRATION066 error message.