How To Fix ST393 - No RFC connection could be established with system &

SAP Error Message - Details

• Message type: E = Error

• Message class: ST - Terminology Database

• Message number: 393

• Message text: No RFC connection could be established with system &

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 ST393 - No RFC connection could be established with system & ?

  The SAP error message ST393 indicates that there is an issue with establishing a Remote Function Call (RFC) connection to a specified system. This can occur for various reasons, and understanding the cause is essential for troubleshooting and resolving the issue.
  Causes of ST393 Error
  
  
  Network Issues: There may be network connectivity problems between the SAP systems. This could be due to firewalls, routing issues, or network outages.
  
  
  Incorrect Configuration: The RFC destination may not be configured correctly in the SAP system. This includes incorrect parameters such as the target system's hostname, system number, or client.
  
  
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to connect to the target system.
  
  
  Target System Down: The target SAP system may be down or not running, which would prevent any connections from being established.
  
  
  SAP Gateway Issues: The SAP Gateway service on the target system may not be running or may be misconfigured.
  
  
  Version Compatibility: There may be compatibility issues between the SAP systems if they are running different versions or patches.
  
  
  Solutions to ST393 Error
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to verify that the source system can reach the target system.
  Ensure that any firewalls or network security settings allow traffic on the required ports (typically port 3200 for SAP).
  
  
  
  Verify RFC Destination Configuration:
  
  Go to transaction SM59 in the source system and check the configuration of the RFC destination.
  Ensure that the connection type is correct (e.g., TCP/IP) and that the hostname, system number, and client are accurate.
  
  
  
  Test the RFC Connection:
  
  In transaction SM59, select the RFC destination and use the "Connection Test" option to check if the connection can be established.
  
  
  
  Check User Authorizations:
  
  Ensure that the user credentials used for the RFC connection have the necessary authorizations in both the source and target systems.
  
  
  
  Check Target System Status:
  
  Verify that the target SAP system is up and running. You can check this by logging into the target system or checking its status in the SAP Management Console.
  
  
  
  Check SAP Gateway:
  
  Ensure that the SAP Gateway service is running on the target system. You can check this using transaction SMGW.
  
  
  
  Review Logs:
  
  Check the system logs (transaction SM21) and the developer traces (transaction ST22) for any additional error messages that might provide more context.
  
  
  
  Consult SAP Notes:
  
  Look for relevant SAP Notes in the SAP Support Portal that may address known issues related to RFC connections.
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SM21: System Log
  ST22: Dump Analysis
  SMGW: Gateway Monitor
  
  
  
  Documentation: Refer to the official SAP documentation for detailed information on configuring RFC connections and troubleshooting connectivity issues.
  
  
  By following these steps, you should be able to identify and resolve the cause of the ST393 error message in your SAP environment.