How To Fix FDT_HRF066 - Error in server communication &1. RFC destination &2

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_HRF - FDT: HRF

• Message number: 066

• Message text: Error in server communication &1. RFC destination &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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_HRF066 - Error in server communication &1. RFC destination &2 ?

  The SAP error message FDT_HRF066 indicates that there is an issue with server communication, specifically related to an RFC (Remote Function Call) destination. This error typically arises when the system is unable to establish a connection to the specified RFC destination, which can be due to various reasons.
  Causes of the Error
  
  Network Issues: There may be network connectivity problems between the SAP system and the target server.
  Incorrect RFC Destination Configuration: 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.
  Target System Down: The target system that the RFC destination points to may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the communication between the systems.
  SAP Gateway Issues: The SAP Gateway service may not be running or may be misconfigured.
  
  Solutions
  
  
  Check Network Connectivity:
  
  Use tools like ping or telnet to check if the target server is reachable from the SAP server.
  
  
  
  Verify RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Check the configuration of the RFC destination specified in the error message.
  Ensure that the connection type, target host, and system number are correctly configured.
  
  
  
  Test the RFC Connection:
  
  In transaction SM59, select the RFC destination and use the "Test Connection" option to see if the connection can be established successfully.
  
  
  
  Check User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations to access the target system.
  
  
  
  Check Target System Status:
  
  Verify that the target system is up and running. If it is down, you may need to contact the system administrator.
  
  
  
  Review Firewall Settings:
  
  Ensure that there are no firewall rules blocking the communication between the SAP systems.
  
  
  
  Check SAP Gateway:
  
  Ensure that the SAP Gateway service is running on both the source and target systems. You can check this in transaction SMGW.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the developer trace files (transaction ST22) for any additional error messages that might provide more context.
  
  
  
  Related Information
  
  RFC Destinations: RFC destinations are defined in transaction SM59 and are used to establish connections between different SAP systems or between SAP and non-SAP systems.
  SAP Notes: Check SAP Notes for any known issues or patches related to the error message. You can search for the error message or related keywords in the SAP Support Portal.
  Documentation: Refer to the SAP Help Portal for detailed documentation on configuring RFC destinations and troubleshooting connectivity issues.
  
  By following these steps, you should be able to identify and resolve the cause of the FDT_HRF066 error in your SAP system.