How To Fix OT775 - Target system (destination &1) unavailable. Timeout after &2 seconds

SAP Error Message - Details

• Message type: E = Error

• Message class: OT - SAP Online Correction Support (SOCS)

• Message number: 775

• Message text: Target system (destination &1) unavailable. Timeout after &2 seconds

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 OT775 - Target system (destination &1) unavailable. Timeout after &2 seconds ?

  The SAP error message OT775 indicates that the target system (destination) is unavailable, and the connection attempt has timed out after a specified number of seconds. This error typically occurs in scenarios involving remote function calls (RFC), background jobs, or when trying to access external systems.
  Causes:
  
  Network Issues: There may be network connectivity problems between the SAP system and the target system.
  Target System Down: The target system may be down or not responding.
  Incorrect Configuration: The RFC destination may be incorrectly configured in the SAP system.
  Firewall Restrictions: Firewalls or security settings may be blocking the connection to the target system.
  Timeout Settings: The timeout settings for the connection may be too low, causing premature timeouts.
  Resource Limitations: The target system may be overloaded or experiencing resource limitations.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to check if the target system is reachable from the SAP server.
  Ensure that there are no network outages or issues.
  
  
  
  Verify Target System Status:
  
  Check if the target system is up and running. If it is down, coordinate with the system administrators to bring it back online.
  
  
  
  Review RFC Destination Configuration:
  
  Go to transaction SM59 in the SAP system and check the configuration of the RFC destination.
  Ensure that the connection parameters (like hostname, service, and system number) are correct.
  
  
  
  Check Firewall and Security Settings:
  
  Ensure that there are no firewall rules blocking the connection to the target system.
  Consult with network/security teams to verify that the necessary ports are open.
  
  
  
  Adjust Timeout Settings:
  
  In transaction SM59, you can adjust the timeout settings for the RFC destination. Look for the "Connection" tab and modify the "Timeout" settings as needed.
  
  
  
  Monitor System Resources:
  
  Check the performance and resource usage of the target system. If it is overloaded, consider optimizing its performance or scaling resources.
  
  
  
  Check SAP Notes:
  
  Look for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: To manage RFC destinations.
  SM21: To check system logs for any related errors.
  ST22: To check for dumps that may provide more context on the issue.
  SICF: To check the status of HTTP services if applicable.
  
  
  
  Documentation: Refer to SAP Help documentation for more details on RFC connections and troubleshooting.
  
  
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  
  By following these steps, you should be able to diagnose and resolve the OT775 error effectively.