How To Fix /SCWM/TDC020 - An edge already exists between nodes &1/&2 and &3/&4

SAP Error Message - Details

• Message type: E = Error

• Message class: /SCWM/TDC -

• Message number: 020

• Message text: An edge already exists between nodes &1/&2 and &3/&4

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 /SCWM/TDC020 - An edge already exists between nodes &1/&2 and &3/&4 ?

  The SAP error message /SCWM/TDC020 An edge already exists between nodes &1/&2 and &3/&4 typically occurs in the context of the SAP Extended Warehouse Management (EWM) system, particularly when dealing with transportation lanes or routes in the Transportation Management (TM) module. This error indicates that there is an attempt to create a transportation connection (edge) between two nodes (locations, warehouses, etc.) that already has an existing connection.
  Cause:
  
  Duplicate Edge Creation: The most common cause of this error is that there is an attempt to create a transportation connection that already exists in the system. This can happen if the same connection is being defined multiple times, either through manual entry or through a data import process.
  Data Integrity Issues: There may be inconsistencies or errors in the data that lead to the system believing that a new edge is being created when it already exists.
  Configuration Errors: Incorrect configuration settings in the transportation network or transportation lanes can also lead to this error.
  
  Solution:
  
  Check Existing Connections: Review the existing transportation connections between the specified nodes (locations). You can do this by navigating to the relevant transaction in SAP EWM or TM and checking the transportation lanes or routes.
  Avoid Duplicate Entries: Ensure that you are not trying to create a duplicate entry. If the connection already exists, you may need to modify or use the existing connection instead of creating a new one.
  Data Cleanup: If there are inconsistencies in the data, consider cleaning up the data to remove any duplicates or erroneous entries.
  Review Configuration: Check the configuration settings for transportation lanes and ensure that they are set up correctly. Make sure that the nodes and connections are defined as intended.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on managing transportation connections in your version of SAP EWM/TM.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like /SCWM/TSO (Transportation Lane) or /SCWM/TL (Transportation Lane Maintenance) to view and manage transportation lanes.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP support team for further assistance.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.