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

GW456 - Overview

• 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.

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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