How To Fix ESH_POST_INSTALL043 - The SAP router was changed to &1

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_POST_INSTALL - ESH Post Installation

• Message number: 043

• Message text: The SAP router was changed to &1

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 ESH_POST_INSTALL043 - The SAP router was changed to &1 ?

  The SAP error message ESH_POST_INSTALL043 indicates that the SAP router has been changed to a new value, which is specified as &1 in the error message. This typically occurs during the installation or configuration of SAP systems, particularly when there are changes in the network configuration or when the system is being connected to a different SAP router.
  Cause:
  
  Router Configuration Change: The SAP router settings in the system profile or configuration have been modified, which can happen during system upgrades, migrations, or manual configuration changes.
  Network Changes: Changes in the network environment, such as moving to a different data center or changes in network policies, can lead to this error.
  Incorrect Router Settings: The new router settings may not be correctly configured or may not point to a valid SAP router.
  
  Solution:
  
  
  Verify Router Configuration:
  
  Check the SAP router string in the system profile (usually in the instance profile or the SAPGUI settings).
  Ensure that the router string is correctly formatted and points to a valid SAP router.
  
  
  
  Update the Router Settings:
  
  If the router has changed, update the configuration in the relevant profiles (e.g., instance profile, default profile).
  Use transaction RZ10 to edit the instance profile and make necessary changes.
  
  
  
  Check Network Connectivity:
  
  Ensure that the system can reach the new SAP router. You can use tools like ping or traceroute to verify connectivity.
  Check firewall settings or any network policies that might block access to the new router.
  
  
  
  Restart the SAP System:
  
  After making changes to the router settings, restart the SAP system to apply the new configuration.
  
  
  
  Consult SAP Notes:
  
  Look for relevant SAP Notes that might provide additional guidance or patches related to this error message.
  
  
  
  Check Logs:
  
  Review the system logs (transaction SM21) and developer traces (transaction ST22) for any additional error messages that might provide more context.
  
  
  
  Related Information:
  
  SAP Router: An SAP router is a program that acts as a gateway between SAP systems and external networks. It is used for secure communication and can help in managing network traffic.
  Transaction Codes: Familiarize yourself with transaction codes like RZ10 (to manage profiles), SM21 (to view system logs), and ST22 (to check dumps) for troubleshooting.
  Documentation: Refer to the official SAP documentation for detailed instructions on configuring SAP routers and troubleshooting network issues.
  
  If the issue persists after following these steps, consider reaching out to SAP support for further assistance.