How To Fix RSOSC156 - RFC connection test for destination &1 failed

SAP Error Message - Details

• Message type: E = Error

• Message class: RSOSC - Scoping framework

• Message number: 156

• Message text: RFC connection test for destination &1 failed

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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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSOSC156 - RFC connection test for destination &1 failed ?

  The SAP error message RSOSC156 indicates that there is a failure in the RFC (Remote Function Call) connection test for a specified destination. This error can occur for various reasons, and understanding the cause is essential for troubleshooting. Below are some common causes, potential solutions, and related information:
  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 in the SAP system (e.g., wrong IP address, port, or system ID).
  Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations.
  Target System Down: The target SAP system may be down or not reachable.
  Firewall Restrictions: Firewalls may be blocking the required ports for RFC communication.
  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.
  Check the configuration of the RFC destination (e.g., connection type, target host, system number, etc.).
  Test the connection from this screen to see if it provides more detailed error messages.
  
  
  
  Check User Credentials:
  
  Ensure that the user ID and password used for the RFC connection are correct.
  Verify that the user has the necessary authorizations to perform the required actions on the target system.
  
  
  
  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.
  
  
  
  Firewall and Security Settings:
  
  Ensure that the necessary ports (usually 3200 for SAP systems) are open in the firewall settings.
  Consult with your network/security team if needed.
  
  
  
  SAP Gateway Configuration:
  
  Check if the SAP Gateway service is running on the target system.
  You can use transaction SMGW to monitor the gateway and check for any issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: To manage RFC destinations.
  SMGW: To monitor the SAP Gateway.
  SICF: To check HTTP services if applicable.
  
  
  
  Logs and Traces:
  
  Check the system logs (transaction SM21) for any related error messages.
  Use transaction ST22 to check for dumps that might provide more context.
  
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to RFC connections.
  
  
  By following these steps, you should be able to identify and resolve the cause of the RSOSC156 error message. If the issue persists, consider reaching out to SAP support for further assistance.