How To Fix S1059 - Received data from unknown RFC server

SAP Error Message - Details

• Message type: E = Error

• Message class: S1 - Statistik / SAP-Monitor

• Message number: 059

• Message text: Received data from unknown RFC server

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 S1059 - Received data from unknown RFC server ?

  The SAP error message S1059, "Received data from unknown RFC server," typically indicates that there is an issue with the Remote Function Call (RFC) communication between SAP systems. This error can occur for several reasons, and understanding the cause is essential for troubleshooting and resolving the issue.
  Causes:
  
  
  Incorrect RFC Destination Configuration: The RFC destination may not be correctly configured in the SAP system. This includes incorrect settings for the target system's connection parameters.
  
  
  Network Issues: There may be network connectivity problems between the SAP systems, such as firewalls blocking the communication or network outages.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to access the target system.
  
  
  Server Name Resolution: The hostname of the target RFC server may not be resolvable, leading to communication failures.
  
  
  Version Mismatch: There may be compatibility issues between different versions of SAP systems involved in the RFC communication.
  
  
  SAP Gateway Issues: The SAP Gateway service may not be running or may be misconfigured, preventing proper communication.
  
  
  Solutions:
  
  
  Check RFC Destination:
  
  Go to transaction SM59 and verify the configuration of the RFC destination.
  Ensure that the target system's connection parameters (like hostname, system number, client, user, and password) are correct.
  
  
  
  Test Connection:
  
  In transaction SM59, use the "Test Connection" feature to check if the RFC destination can successfully connect to the target system.
  
  
  
  Network Configuration:
  
  Check for any network issues, including firewalls or routing problems that may be blocking the connection.
  Ensure that both systems can ping each other.
  
  
  
  User Authorizations:
  
  Verify that the user credentials used for the RFC connection have the necessary authorizations in the target system.
  
  
  
  Check Hostname Resolution:
  
  Ensure that the hostname of the target system can be resolved correctly. You can test this by using the command line to ping the hostname.
  
  
  
  Review SAP Gateway:
  
  Check if the SAP Gateway service is running on both systems. You can use transaction SMGW to monitor the gateway.
  
  
  
  Check for Version Compatibility:
  
  Ensure that both SAP systems are compatible in terms of RFC communication. If there are significant version differences, consider updating or patching the systems.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the developer trace files (transaction ST11) for any additional error messages that may provide more context.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC communication.
  Documentation: Review SAP documentation on RFC and network configuration for best practices and troubleshooting steps.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered similar issues.
  
  By systematically checking these areas, you should be able to identify and resolve the cause of the S1059 error message.