How To Fix RSAOLTP304 - The RFC connection for destination &1 does not work

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAOLTP - Notifications in OLTP Source Environment

• Message number: 304

• Message text: The RFC connection for destination &1 does not work

What causes this issue?

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System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSAOLTP304 - The RFC connection for destination &1 does not work ?

  The SAP error message RSAOLTP304 indicates that there is an issue with the Remote Function Call (RFC) connection for a specified destination. This error typically arises when the system is unable to establish a connection to the target system defined in the RFC destination.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system.
  Incorrect Configuration: The RFC destination may be incorrectly configured, including wrong parameters such as the hostname, system number, or client.
  Target System Down: The target SAP system may be down or not reachable.
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection.
  SAP Gateway Issues: The SAP Gateway service may not be running on the target system.
  
  Solutions:
  
  
  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 network outages or issues.
  
  
  
  Verify RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the RFC destination that is causing the issue and check its configuration.
  Ensure that the connection type, target host, system number, and client 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 successfully.
  
  
  
  Check Target System Status:
  
  Ensure that the target SAP system is up and running.
  Check if the SAP services are active on the target system.
  
  
  
  Review User Credentials:
  
  Ensure that the user credentials used for the RFC connection are correct and have the necessary authorizations.
  You can test the credentials by logging into the target system with the same user.
  
  
  
  Firewall and Security Settings:
  
  Check if there are any firewall rules that might be blocking the connection.
  Ensure that the necessary ports for SAP communication (e.g., 3200 for SAP GUI, 3300 for RFC) are open.
  
  
  
  Check SAP Gateway:
  
  Ensure that the SAP Gateway service is running on the target system.
  You can check the status of the gateway using transaction SMGW.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: Manage RFC Destinations
  SMGW: Gateway Monitor
  SICF: Check HTTP services (if applicable)
  
  
  
  Logs and Traces:
  
  Check the system logs (SM21) and developer traces (ST22) for any additional error messages that might provide more context.
  
  
  
  SAP Notes: 
  
  Search for relevant SAP Notes in the SAP Support Portal that might address specific issues related to RFC connections.
  
  
  
  By following these steps, you should be able to diagnose and resolve the RSAOLTP304 error effectively.