How To Fix INM_MSG_ON002 - A connection error occurred with the RFC destination &

SAP Error Message - Details

• Message type: E = Error

• Message class: INM_MSG_ON - NAV - PPM Objects

• Message number: 002

• Message text: A connection error occurred with the RFC destination &

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 INM_MSG_ON002 - A connection error occurred with the RFC destination & ?

  The SAP error message INM_MSG_ON002 indicates that there is a connection error with the RFC (Remote Function Call) destination specified in the message. This error typically occurs 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 system defined in the RFC destination.
  
  
  Incorrect RFC Destination Configuration: The RFC destination may be incorrectly configured. This includes wrong parameters such as the target host, system number, client, user credentials, etc.
  
  
  Target System Down: The target SAP system may be down or not reachable due to maintenance or other issues.
  
  
  Firewall Restrictions: Firewalls or security settings may be blocking the connection to the target system.
  
  
  Authorization Issues: The user credentials used in the RFC destination may not have the necessary authorizations to connect to the target system.
  
  
  SAP Gateway Issues: The SAP Gateway service may not be running on the target system, preventing connections.
  
  
  Solutions
  
  
  Check Network Connectivity: Ensure that there is network connectivity between the source and target systems. You can use tools like ping or telnet to test connectivity.
  
  
  Verify RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP GUI.
  Locate the RFC destination that is causing the error.
  Check the configuration settings, including the target host, system number, client, user, and password.
  Test the connection using the "Connection Test" button in the SM59 transaction.
  
  
  
  Check Target System Status: Ensure that the target SAP system is up and running. You can check this by logging into the target system or contacting the system administrator.
  
  
  Review Firewall Settings: If applicable, check the firewall settings to ensure that the necessary ports for SAP communication are open.
  
  
  Check User Authorizations: Verify that the user credentials used in the RFC destination have the necessary authorizations to connect to the target system.
  
  
  Check SAP Gateway: Ensure that the SAP Gateway service is running on the target system. You can check this in transaction SMGW.
  
  
  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 about the connection issue.
  
  
  Related Information
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM21: System Log
  ST11: Developer Traces
  SMGW: SAP Gateway Monitor
  
  
  
  Documentation: Refer to SAP Help documentation for more details on configuring RFC destinations and troubleshooting connection issues.
  
  
  By following these steps, you should be able to identify and resolve the cause of the INM_MSG_ON002 error. If the issue persists, consider reaching out to your SAP Basis team or SAP support for further assistance.