How To Fix G3120 - Logical system &1 is assigned to more than one local client

SAP Error Message - Details

• Message type: E = Error

• Message class: G3 - Messages for SAP Consolidation: Integration

• Message number: 120

• Message text: Logical system &1 is assigned to more than one local client

What causes this issue?

You are attempting to determine the client of the assigned system from
logical system &V1&. This is only possible when the logical system is
assigned to only one client. However, logical system &V1& is assigned
to clients &V2& und &V3& (and possibly others).

System Response

The client of the system cannot be determined.

How to fix this error?

Make sure that each logical system designation is only used once.

Procedure for System Administrators

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 G3120 - Logical system &1 is assigned to more than one local client ?

  The SAP error message G3120 indicates that a logical system is assigned to more than one local client in the SAP system. This situation typically arises in scenarios where multiple clients are configured to use the same logical system, which can lead to data inconsistencies and issues with data transport.
  Cause:
  
  Duplicate Assignment: The logical system has been assigned to multiple clients in the SAP system configuration.
  Incorrect Configuration: During system setup or client copy processes, the same logical system may have been inadvertently assigned to different clients.
  Transport Management Issues: If the transport landscape is not properly configured, it can lead to the same logical system being assigned to multiple clients.
  
  Solution:
  To resolve the G3120 error, you need to ensure that each logical system is uniquely assigned to a single client. Here are the steps to do this:
  
  
  Check Logical System Assignments:
  
  Go to transaction code SCC4 (Client Administration).
  Review the list of clients and their assigned logical systems.
  
  
  
  Identify Duplicates:
  
  Use transaction code BD54 (Maintain Logical System) to view the logical systems and their assignments.
  Identify any logical systems that are assigned to more than one client.
  
  
  
  Reassign Logical Systems:
  
  If you find a logical system assigned to multiple clients, you will need to reassign it:
  
  Decide which client should retain the logical system assignment.
  For the other clients, either remove the logical system assignment or assign a different logical system.
  
  
  
  
  
  Transport Configuration:
  
  If the issue is related to transport management, ensure that the transport routes and logical system assignments are correctly configured in transaction STMS.
  
  
  
  Testing:
  
  After making the changes, test the configuration to ensure that the error no longer occurs and that data transport works as expected.
  
  
  
  Related Information:
  
  Logical Systems: Logical systems are used in SAP to identify different systems in a landscape, especially for data transport and integration purposes.
  Client: A client in SAP is a self-contained unit with separate master records and its own set of tables.
  Transport Management System (TMS): TMS is used to manage the transport of objects between different SAP systems and clients.
  
  Additional Considerations:
  
  Always back up your configuration before making changes.
  If you are unsure about the changes, consult with your SAP Basis team or a qualified SAP consultant.
  Document any changes made for future reference and troubleshooting.
  
  By following these steps, you should be able to resolve the G3120 error and ensure that each logical system is correctly assigned to a single client.