How To Fix TB519 - Logon system/client and comparison system/client are the identical

SAP Error Message - Details

• Message type: E = Error

• Message class: TB - SM31 table maintenance messages

• Message number: 519

• Message text: Logon system/client and comparison system/client are the identical

What causes this issue?

You want to compare a view or table.
However, in your choice of RFC connection, the logon system and client
are identical to the comparison system and client. A comparison would
make no sense, since there can be no differences.

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 TB519 - Logon system/client and comparison system/client are the identical ?

  The SAP error message TB519 indicates that the logon system/client and the comparison system/client are identical. This typically occurs when you are trying to perform a comparison or a transport operation between two systems or clients that are the same, which is not allowed.
  Cause:
  
  Identical Systems/Clients: The most common cause of this error is that the source and target systems or clients you are trying to compare or transport data between are the same. For example, if you are trying to transport changes from client 100 to client 100, the system will throw this error.
  Incorrect Configuration: Sometimes, the configuration settings in the transport management system (TMS) may be incorrectly set, leading to this error.
  
  Solution:
  
  Check System/Client Configuration: Ensure that you are selecting different systems or clients for the operation. For example, if you are transporting changes, make sure the source and target clients are different.
  Review Transport Requests: If you are working with transport requests, verify that the transport request is being directed to the correct target client.
  Use Different Clients: If you need to compare or transport data, make sure to use different clients. For example, if you are in client 100, you might want to compare or transport to client 200 or another client.
  TMS Configuration: If you suspect that the TMS configuration is incorrect, you may need to review and adjust the transport routes and settings in the Transport Management System.
  
  Related Information:
  
  Transport Management System (TMS): This is the tool used in SAP to manage transports between different systems. Understanding how TMS works can help prevent this error.
  SAP Notes: Check SAP Notes for any specific notes related to this error message. SAP frequently updates its knowledge base with solutions and workarounds for common issues.
  SAP Community: Engaging with the SAP Community can provide insights from other users who may have encountered and resolved similar issues.
  
  By ensuring that you are working with different systems or clients and reviewing your transport configurations, you should be able to resolve the TB519 error.