How To Fix PU657 - Unknown system &1 from domain &2 with client &3

SAP Error Message - Details

• Message type: E = Error

• Message class: PU - Upgrade and Transport Log Messages

• Message number: 657

• Message text: Unknown system &1 from domain &2 with client &3

What causes this issue?

The system &V1& from the domain &V2& with the client &V3& is unknown.

System Response

The action was terminated.

How to fix this error?

Contact the system administrator.

Procedure for System Administrators

The system was checked using the implementations of the enhancement spot
CTS_BADI_FOREIGN_SYSTEM_SPOT.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message PU657 - Unknown system &1 from domain &2 with client &3 ?

  The SAP error message PU657 "Unknown system &1 from domain &2 with client &3" typically indicates that the system is unable to recognize or connect to a specified system in the landscape. This can occur in various scenarios, such as when trying to access a remote system or during system configuration.
  Causes:
  
  Incorrect System Configuration: The system might not be properly configured in the SAP Landscape Management (LaMa) or in the SAP system itself.
  Network Issues: There could be network connectivity issues preventing the system from reaching the specified client.
  Domain Mismatch: The domain specified in the error message may not match the actual domain of the system.
  Client Not Available: The specified client may not be available or may not exist in the target system.
  Authorization Issues: The user may not have the necessary authorizations to access the specified system or client.
  
  Solutions:
  
  
  Check System Configuration:
  
  Verify that the system is correctly configured in the SAP Landscape Management or in the relevant configuration settings.
  Ensure that the system is registered and active in the SAP system.
  
  
  
  Network Connectivity:
  
  Check the network connection between the systems. Ensure that firewalls or network policies are not blocking access.
  Use tools like ping or traceroute to test connectivity to the target system.
  
  
  
  Verify Domain and Client:
  
  Confirm that the domain and client specified in the error message are correct.
  Check the SAP system's configuration to ensure that the client exists and is active.
  
  
  
  Review Authorizations:
  
  Ensure that the user has the necessary authorizations to access the specified system and client.
  Check user roles and profiles to confirm that they include access to the required systems.
  
  
  
  SAP Notes and Support:
  
  Search for relevant SAP Notes that may address this specific error message. SAP frequently updates its knowledge base with solutions for known issues.
  If the issue persists, consider reaching out to SAP Support for further assistance.
  
  
  
  Related Information:
  
  SAP Documentation: Review the official SAP documentation for system configuration and landscape management.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  System Logs: Check system logs (transaction SM21) for any additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to diagnose and resolve the PU657 error in your SAP environment.