How To Fix /MSG/4_PM_MESSAGE051 - System or communication error '&1&2' at RFC destination '&3'

SAP Error Message - Details

• Message type: E = Error

• Message class: /MSG/4_PM_MESSAGE -

• Message number: 051

• Message text: System or communication error '&1&2' at RFC destination '&3'

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 /MSG/4_PM_MESSAGE051 - System or communication error '&1&2' at RFC destination '&3' ?

  The SAP error message /MSG/4_PM_MESSAGE051 indicates a system or communication error that occurred at the RFC (Remote Function Call) destination specified in the message. The placeholders &1, &2, and &3 represent specific details about the error, such as the error code, additional error information, and the RFC destination name, respectively.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system defined in the RFC destination.
  RFC Destination Configuration: The RFC destination may not be configured correctly. This includes incorrect login credentials, incorrect target host or service, or missing parameters.
  Target System Down: The target system may be down or not reachable due to maintenance or other issues.
  Firewall Restrictions: Firewalls or security settings may be blocking the communication between the two systems.
  SAP System Issues: There may be issues with the SAP system itself, such as memory issues, performance problems, or other system errors.
  
  Solutions:
  
  Check Network Connectivity: Ensure that the network connection between the two systems is stable and functioning. You can use tools like ping or traceroute to test connectivity.
  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 service are correctly set.
  Test the connection using the "Connection Test" button in the RFC destination configuration.
  
  
  Check Target System Status: Verify that the target system is up and running. If it is down, coordinate with the system administrators to resolve the issue.
  Review Firewall Settings: Ensure that any firewalls between the two systems allow traffic on the required ports for RFC communication.
  Check SAP System Logs: Look at the system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages that might provide more context about the issue.
  Consult SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that might address known issues related to this error message.
  
  Related Information:
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SM21: System Log
  ST22: Dump Analysis
  SICF: Maintain HTTP Services (if applicable)
  
  
  SAP Support: If the issue persists after checking the above points, consider reaching out to SAP Support for further assistance, providing them with the error details and any logs you have gathered.
  
  By following these steps, you should be able to diagnose and resolve the communication error indicated by the /MSG/4_PM_MESSAGE051 message.