How To Fix GW456 - Timeout during connection setup; check that the partner exists

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 456

• Message text: Timeout during connection setup; check that the partner exists

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message GW456 - Timeout during connection setup; check that the partner exists ?

  The SAP error message GW456: Timeout during connection setup; check that the partner exists typically indicates that there is a problem with the connection between the SAP system and the partner system (which could be another SAP system or a non-SAP system). This error can occur in various scenarios, such as when using RFC (Remote Function Call), HTTP, or other communication protocols.
  Causes:
  
  
  Network Issues: There may be network connectivity problems between the SAP system and the partner system. This could include firewalls blocking the connection, incorrect routing, or network outages.
  
  
  Incorrect Configuration: The connection settings (such as the destination configuration in transaction SM59 for RFC connections) may be incorrect. This includes wrong IP addresses, hostnames, or ports.
  
  
  Partner System Down: The partner system may be down or not reachable due to maintenance or other issues.
  
  
  Timeout Settings: The timeout settings for the connection may be too short, causing the connection to time out before it can be established.
  
  
  Authorization Issues: There may be authorization issues preventing the SAP system from connecting to the partner system.
  
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or traceroute to check if the partner system is reachable from the SAP system.
  Ensure that there are no firewalls or network policies blocking the connection.
  
  
  
  Verify Configuration:
  
  Go to transaction SM59 and check the configuration of the RFC destination. Ensure that the hostname, port, and other settings are correct.
  Test the connection from SM59 to see if it can connect successfully.
  
  
  
  Check Partner System Status:
  
  Verify that the partner system is up and running. If it is down, coordinate with the relevant team to bring it back online.
  
  
  
  Adjust Timeout Settings:
  
  If the connection is taking longer than expected, consider increasing the timeout settings in the connection configuration.
  
  
  
  Review Authorization:
  
  Ensure that the user credentials used for the connection have the necessary authorizations to access the partner system.
  
  
  
  Check Logs:
  
  Review the SAP system logs (transaction SM21) and the application logs (transaction SLG1) for any additional error messages that might provide more context.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM21: System Log
  SLG1: Application Log
  ST22: Dump Analysis (to check for any ABAP runtime errors)
  
  
  
  SAP Notes: Check SAP Notes related to the specific error message or connection type for any known issues or patches.
  
  
  Documentation: Refer to SAP documentation for detailed information on configuring connections and troubleshooting connectivity issues.
  
  
  By following these steps, you should be able to identify and resolve the cause of the GW456 error message.